1. Overview
Michael Mackenzie Lowe McDonald (born April 16, 1995), often known by his nickname "Mackie", is an American professional tennis player. He achieved his career-high singles ranking of world No. 37 on October 16, 2023, and No. 49 in doubles on October 2, 2023. As of January 27, 2025, his current singles ranking is world No. 125, and his current doubles ranking is world No. 86 (as of November 11, 2024). McDonald's career is marked by his significant achievements in both junior and college tennis, including winning both the singles and doubles titles at the 2016 NCAA Division I Tennis Championships. His professional career highlights include reaching the fourth round of the Australian Open and Wimbledon, making his first ATP Tour final appearance at the 2021 Citi Open, and clinching his maiden ATP Tour doubles title at the 2022 Rakuten Japan Open Tennis Championships. Noteworthy singles victories include defeating Rafael Nadal at the 2023 Australian Open and reaching his first ATP Tour Masters 1000 quarterfinal at the 2023 National Bank Open.
2. Early Life and Education
Mackenzie McDonald was born on April 16, 1995, in Piedmont, California, U.S., and resides in Lake Nona, Orlando, Florida, U.S. He is of Chinese, Scottish, and English descent. McDonald's interest in tennis began at the age of three, initiated by his father, Michael, an oral surgeon. His mother is Vivian Young, and his elder sister, Dana Jones, was a gymnast who also graduated from UCLA. Early in his development, he was coached by Rosie Bareis, and from the age of 11, he received coaching from former top-10 player Wayne Ferreira. Growing up, McDonald admired tennis legend Roger Federer, NBA icon Kobe Bryant, and former UCLA basketball coach John Wooden. He attended Piedmont High School before pursuing his college tennis career at UCLA. McDonald stands 70 in (178 cm) tall and weighs 161 lb (73 kg). His career prize money amounts to 6.06 M USD.
2.1. Junior Career
During his junior career, McDonald demonstrated significant potential. He reached the semifinals of the boys' singles at the 2012 Australian Open. In the same year, he attained a career-high ranking of world No. 12 in the ITF World Tour Junior Rankings and won the 18s singles title at the 2012 Easter Bowl. While still a junior, he secured the men's singles title at the amateur Ojai Tennis Tournament in 2013. In a notable early professional appearance, at just 18 years old, he qualified for the 2013 Cincinnati Masters by defeating top-100 players Nicolas Mahut and Steve Johnson, despite never having earned an ATP point previously. He became the first unranked teenager to qualify for an ATP World Tour Masters 1000 tournament since Sergio Casal at the 1995 Miami Masters. However, he was defeated in the first round of the main draw by fellow qualifier David Goffin. Following this, he received a wildcard entry into the qualifying rounds of the 2013 US Open.
2.2. College Career
McDonald embarked on a highly successful collegiate tennis career at the University of California, Los Angeles (UCLA), playing from 2014 to 2016. Recognized as the No. 1 incoming player by the ITA, he made an immediate impact. As a freshman, he was named a Singles All-American and the Pac-12 Freshman of the Year. He reached the quarterfinals of the NCAA singles championship, compiling a 33-9 overall record and an 18-4 record in dual matches during the season. In 2015, he played at the No. 1 singles and doubles positions for the UCLA Bruins for most of the season and defeated top-ranked Axel Alvarez of Oklahoma during team competition at the 2015 NCAA Division I Men's Tennis Championship.
His pinnacle collegiate achievement came in 2016, when he led his Bruins team to the quarterfinals of the Division I Tennis Team Championship. On May 30, McDonald triumphed over the No. 1 ranked Mikael Torpegaard of Ohio State University to win the singles championship at the Michael D. Case Tennis Center in Tulsa, Oklahoma. This made him the 12th UCLA Bruins player to secure the singles title. Furthermore, he partnered with Martin Redlicki to win the doubles championship, defeating the team of Arthur Rinderknech and Jackson Withrow from Texas A&M. By winning both the national singles and doubles titles, McDonald became the first college player to achieve this feat since Matías Boeker of the University of Georgia in 2001. After his historic NCAA performance, he announced on June 16, 2016, his decision to forgo his senior year at UCLA and turn professional.
3. Professional Career
Mackenzie McDonald's professional journey began in 2016, following his triumphant college career, and has seen him navigate through injuries to achieve consistent presence and notable successes on the ATP Tour.
3.1. 2013-2015: ATP Main Draw Debut
McDonald made his earliest appearances in professional tournaments while still in college. At age 18 in 2013, he qualified for the main draw of the Cincinnati Masters by defeating two players ranked in the top 100, becoming the first unranked teenager since 1995 to qualify for an ATP Masters 1000 event. He subsequently lost in the first round to David Goffin in straight sets. He also received a wildcard for the qualifying rounds of the 2013 US Open. In 2014, McDonald qualified for the main draw of the Challenger in Winnetka, Illinois, where he secured a victory over world No. 154 Sam Groth.
3.2. 2016: Turned Professional and Grand Slam Debut
Following his NCAA championship victories, McDonald officially turned professional in 2016. He was granted a wildcard into the main draw of the US Open, marking his Grand Slam main draw debut. In a challenging first-round match, he lost to Czech qualifier Jan Šátral in five sets. In the latter part of the year, from late September to early October, McDonald achieved significant results in Challenger-level tournaments. He won his first ITF Pro Circuit title at the USA F29 Irvine Futures. He also reached back-to-back semifinals in Tiburon and Stockton, securing impressive wins against three top-150 players. He concluded the year ranked No. 321.
3.3. 2017: First Challenger Title and Oracle US Tennis Awards
McDonald started 2017 by winning the singles title at the F1 Los Angeles Pro Futures, held at the University of Southern California, where he defeated Carl Söderlund in the final by winning the last eleven games. In March, at the BNP Paribas Open in Indian Wells, McDonald, alongside former University of Virginia tennis player Danielle Collins, was awarded the Oracle US Tennis Awards. These awards are presented to exceptional collegiate players transitioning to a professional career. McDonald continued his success in doubles, winning the USA F12 Futures doubles event with Lloyd Glasspool, which marked his fifth career Futures doubles title. In October, he secured his first ATP Challenger Tour title at the Fairfield Challenger, defeating Bradley Klahn in the final. He finished the season ranked No. 176.
3.4. 2018: Wimbledon Fourth Round and Top 100 Debut
McDonald began 2018 by participating in his first Australian Open main draw, where he defeated Elias Ymer in the first round after successfully navigating the qualifiers. In the second round, he played a thrilling five-set match against the then-world No. 3, Grigor Dimitrov, ultimately losing 6-4, 2-6, 4-6, 6-0, 6-8. In February, he reached the final of the RBC Tennis Championships of Dallas, where he was defeated by Kei Nishikori in straight sets. In April, he claimed his second Challenger title at the Seoul Open Challenger, overcoming Jordan Thompson with a score of 1-6, 6-4, 6-1.
His breakout performance came at Wimbledon. He reached his first Grand Slam third round by winning his first-ever five-set match against Nicolás Jarry in the second round. He then advanced to the second week of a Grand Slam for the first time in his career by defeating Guido Pella in straight sets. His impressive run concluded in the fourth round, where he was defeated by Milos Raonic in four sets. This strong showing at Wimbledon propelled him into the ATP Top 100, finishing the year ranked No. 78.
3.5. 2019: Injury and First Top 10 Win
McDonald started 2019 by reaching the final of the Dallas Challenger for the second consecutive year, where he lost to Mitchell Krueger in three sets despite holding a lead. In February, he participated in the 2019 Delray Beach Open and secured his first career win against a top-10 ranked player, defeating Juan Martín del Potro in the quarterfinals (6-4, 3-6, 7-6(7-5)). This victory propelled him to his first ATP-level semifinal, where he was eventually defeated by Radu Albot. His strong form continued into the Acapulco ATP 500 tournament, where he reached the quarterfinals before losing to Cameron Norrie in straight sets. These results helped him achieve a then-career-high singles ranking of world No. 62 on March 4, 2019.
However, his season was abruptly cut short at the 2019 French Open. He suffered a serious hamstring injury during his first-round doubles match, necessitating surgery and forcing him to miss the remainder of the 2019 season. This injury caused his ranking to fall outside the Top 100. He ended the year ranked No. 129.
3.6. 2020: Tour Return and US Open Doubles Quarterfinal
McDonald made his return to the tour in January 2020 at the ASB Classic in Auckland, though he lost in the final round of qualifying. Using a protected ranking to enter the main draw of the Australian Open, he was defeated in the first round by the 30th seed, world No. 32 Dan Evans, despite holding a two-sets-to-love lead. Following this, he competed in Challenger events, reaching the quarterfinals of the RBC Championships of Dallas.
At the 2020 US Open, McDonald again faced a tough first-round loss, this time to 30th seed Casper Ruud, after being two sets up. Despite this, he achieved his best Grand Slam doubles result by reaching the quarterfinals of the men's doubles event at the US Open. On his debut at the French Open, McDonald secured his first victory at a Major since the 2019 Australian Open, defeating Canadian qualifier Steven Diez in four sets under the guidance of his new coach, Jaime Pulgar García. His run ended in the second round with a straight-sets loss to the defending and eventual champion, Rafael Nadal. He finished 2020 ranked No. 193.
3.7. 2021: Australian Open Fourth Round and First ATP Final
McDonald's 2021 season began with a first-round loss at the Delray Beach Open. At the Murray River Open, he defeated 14th seed Richard Gasquet before falling in the second round. Ranked No. 192, he delivered a significant upset in the second round of the Australian Open, defeating 22nd seed and world No. 25 Borna Ćorić. He continued his impressive run to reach the fourth round of a Major for the second time in his career, where he was ultimately defeated by fourth seed and eventual finalist, Daniil Medvedev, in straight sets.
After the Australian Open, McDonald continued his success at the Challenger level, winning his fifth Challenger title at the Nur-Sultan Challenger, beating Jurij Rodionov in the final. He reached the second round of the Open 13 Provence in Marseille and the Miami Open. On clay, he reached the second round of the BMW Open in Munich, upsetting sixth seed Dušan Lajović. He also reached the semifinals of the Heilbronner Neckarcup. At the French Open, after qualifying, he lost in a tight five-set second-round match to 22nd seed Cristian Garín, despite holding two match points. His grass-court season included a semifinal appearance at the Nottingham Trophy.
The highlight of his 2021 season came at the Citi Open in Washington, D.C. He upset defending champion Nick Kyrgios in the first round, and subsequently defeated Denis Kudla in the quarterfinals to reach his second Tour-level semifinal and first at the ATP 500 level. In the semifinals, he overcame 2015 champion Kei Nishikori in three sets to reach his first career ATP Tour final. He was a runner-up in the final, losing to fifth seed and world No. 24 Jannik Sinner in three sets. As a direct result of this performance, McDonald re-entered the Top 100 for the first time in two years, climbing over 40 positions to world No. 64 on August 9, 2021. He finished the year ranked No. 55.
3.8. 2022: Top 50 Singles Debut and Maiden ATP Doubles Title
McDonald began 2022 at the Melbourne Summer Set 1 and the Adelaide International 2, exiting in the second and first rounds, respectively. At the Australian Open, he lost in the second round to 18th seed Aslan Karatsev. In February, he reached his top 50 singles debut, ranking No. 49 on February 7. He upset seventh seed and defending champion Aslan Karatsev in the first round of the Dubai Championships, eventually losing in the quarterfinals to world No. 7 Andrey Rublev. He also reached the third round of the Miami Open, upsetting 26th seed Grigor Dimitrov before losing to Alexander Zverev.
On the clay court season, McDonald reached the third round of the French Open for the first time, notably upsetting 22nd seed Nikoloz Basilashvili in the second round, before falling to 11th seed Jannik Sinner. In doubles, he also reached the third round. His grass-court season included second-round losses at the Halle Open and Wimbledon.
A significant milestone occurred at the 2022 Rakuten Japan Open Tennis Championships, where McDonald won his maiden ATP Tour doubles title. Partnering with Marcelo Melo, they defeated third seeds Rafael Matos and David Vega Hernández. This victory propelled him into the doubles Top 100, reaching a new career-high doubles ranking of No. 96 on October 10, 2022. McDonald ended the year ranked No. 63 in singles.
3.9. 2023: First Masters Quarterfinal and 100th Career Win
McDonald's 2023 season started with significant performances. At the Australian Open, in the second round, he achieved a monumental upset by defeating the injured top seed Rafael Nadal in straight sets (6-4, 6-4, 7-5). He advanced to the third round before losing to 31st seed Yoshihito Nishioka. In February, he made his Davis Cup debut, winning his match against Sergey Fomin as the USA swept Uzbekistan 4-0 to reach the Finals. He reached the semifinals of the Delray Beach Open, defeating Nishioka in the second round and Michael Mmoh in the quarterfinals before losing to top seed Taylor Fritz. He also reached the quarterfinals of the Mexican Open.
In March, at the Miami Open, he defeated 19th seed Matteo Berrettini in the second round. His clay-court season included first-round exits at the Monte-Carlo Masters, Barcelona Open, and Italian Open, though he reached the doubles quarterfinals at the Italian Open with Frances Tiafoe.
On grass, he reached the quarterfinals of the Libéma Open and the semifinals of the Eastbourne International, where he upset top seed and world No. 9 Taylor Fritz in the second round. At the 2023 Citi Open, he and Ben Shelton reached their second ATP Tour doubles final.
A major career highlight came at the Canadian Open in August, where McDonald reached his first ATP Tour Masters 1000 quarterfinal. He achieved this by upsetting sixth seed Andrey Rublev and wildcard Milos Raonic before losing to Alejandro Davidovich Fokina. This performance propelled him to a new career-high singles ranking of world No. 39 on August 21, 2023. At the Cincinnati Masters, he reached the third round with a victory over Holger Rune before retiring from his next match. At the US Open, he defeated 15th seed Félix Auger-Aliassime in the first round. In October, at the 2023 Rolex Paris Masters, he recorded his 100th career win on tour against fellow American J. J. Wolf. He ended the year ranked No. 41.
3.10. 2024: Masters Doubles Runner-up
McDonald started 2024 with a first-round loss at the Australian Open. After a four-month break, he returned for the clay season, though he suffered first-round exits at the French Open and Wimbledon. A notable achievement in 2024 was reaching his first ATP Tour Masters 1000 doubles final at the Cincinnati Open, partnering with Alex Michelsen. They ultimately lost in the final to Marcelo Arévalo and Mate Pavić in straight sets. At the US Open, he was defeated by top seed Jannik Sinner in the first round. In the fall, he reached back-to-back finals at the Nonthaburi Challenger IV and Hangzhou Challenger, finishing as runner-up in both. The following week, he won the Shenzhen Longhua Open, securing his fourth ATP Challenger Tour title. He concluded 2024 ranked No. 131 in singles and No. 87 in doubles.
4. Playing Style
Mackenzie McDonald employs a right-handed playing style and utilizes a two-handed backhand. He is known for his consistent baseline play, athleticism, and ability to absorb pace. His game often features quick movement and aggressive returns, allowing him to transition from defense to offense effectively.
5. Personal Life
Michael Mackenzie Lowe McDonald is commonly known by his nickname "Mackie". He is of Chinese, Scottish, and English ancestry. His father, Michael, is an oral surgeon, and his mother is Vivian Young. His elder sister, Dana Jones, was a gymnast who attended UCLA. McDonald's early tennis development was influenced by coaches Rosie Bareis and later, from age 11, by former top-10 professional player Wayne Ferreira. Growing up, he held great admiration for tennis icon Roger Federer, basketball legend Kobe Bryant, and the esteemed former UCLA basketball coach John Wooden. McDonald is in a relationship with fellow tennis player Maria Mateas, who is a Romanian American.
6. Career Statistics
6.1. Singles Performance Timeline
This table reflects Mackenzie McDonald's year-by-year performance and win-loss records in major singles tournaments including Grand Slams and ATP Masters 1000 events.
| Tournament | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | SR | W-L | Win% |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grand Slam tournaments | ||||||||||||||||
| Australian Open | A | A | A | A | A | 2R | 2R | 1R | 4R | 2R | 3R | 1R | Q3 | 0 / 7 | 8-7 | 53% |
| French Open | A | A | A | A | Q2 | A | 1R | 2R | 2R | 3R | 1R | 1R | 0 / 6 | 4-6 | 40% | |
| Wimbledon | A | A | A | A | Q2 | 4R | A | NH | 1R | 2R | 1R | 1R | 0 / 5 | 4-5 | 44% | |
| US Open | Q1 | Q1 | A | 1R | Q2 | 1R | A | 1R | 2R | 1R | 2R | 1R | 0 / 7 | 2-7 | 22% | |
| Win-loss | 0-0 | 0-0 | 0-0 | 0-1 | 0-0 | 4-3 | 1-2 | 1-3 | 5-4 | 4-4 | 3-4 | 0-4 | 0-0 | 0 / 25 | 18-25 | 42% |
| ATP Masters 1000 | ||||||||||||||||
| Indian Wells Masters | A | A | Q2 | 1R | A | Q2 | 2R | NH | 2R | 2R | 2R | A | 0 / 5 | 4-5 | 44% | |
| Miami Open | A | A | A | A | A | Q2 | 2R | NH | 2R | 3R | 3R | A | 0 / 4 | 6-4 | 60% | |
| Monte-Carlo Masters | A | A | A | A | A | A | A | NH | A | A | 1R | A | 0 / 1 | 0-1 | 0% | |
| Madrid Open | A | A | A | A | A | A | Q1 | NH | A | Q2 | 1R | A | 0 / 1 | 0-1 | 0% | |
| Italian Open | A | A | A | A | A | A | A | A | A | Q1 | 1R | 1R | 0 / 2 | 0-2 | 0% | |
| Canadian Open | A | A | A | A | A | 1R | A | NH | 1R | 1R | QF | 1R | 0 / 5 | 3-5 | 38% | |
| Cincinnati Masters | 1R | Q1 | A | A | Q2 | 1R | A | 1R | 2R | 2R | 3R | Q2 | 0 / 6 | 4-6 | 40% | |
| Shanghai Masters | A | A | A | A | A | 2R | A | NH | 2R | A | 0 / 2 | 2-2 | 50% | |||
| Paris Masters | A | A | A | A | A | Q1 | A | A | 1R | Q1 | 2R | A | 0 / 2 | 1-2 | 33% | |
| Win-loss | 0-1 | 0-0 | 0-0 | 0-1 | 0-0 | 1-3 | 2-2 | 0-1 | 3-5 | 4-4 | 10-9 | 0-2 | 0-0 | 0 / 28 | 20-28 | 42% |
| Career statistics | ||||||||||||||||
| Tournament | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | SR | W-L | Win% |
| Tournaments | 1 | 0 | 0 | 3 | 0 | 13 | 12 | 8 | 19 | 28 | 27 | 13 | 1 | Career total: 125 | ||
| Titles | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Career total: 0 | ||
| Finals | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | Career total: 1 | ||
| Overall win-loss | 0-1 | 0-0 | 0-0 | 0-3 | 0-0 | 9-13 | 10-12 | 4-8 | 18-19 | 26-28 | 33-28 | 5-13 | 2-1 | 0 / 125 | 107-126 | 46% |
| Year-end ranking | 673 | 642 | 371 | 321 | 176 | 78 | 129 | 193 | 55 | 63 | 41 | 131 | ||||
6.2. Doubles Performance Timeline
This table outlines Mackenzie McDonald's year-by-year results and win-loss records in major doubles tournaments.
| Tournament | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | SR | W-L | Win% |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grand Slam tournaments | ||||||||||||
| Australian Open | A | A | A | 1R | A | 2R | 1R | A | 1R | 0 / 4 | 1-4 | 20% |
| French Open | A | A | A | 1R | 1R | 1R | 3R | 2R | 2R | 0 / 6 | 4-6 | 40% |
| Wimbledon | A | A | Q1 | A | NH | A | 1R | 1R | 2R | 0 / 3 | 1-3 | 25% |
| US Open | 1R | A | 2R | A | QF | 1R | 1R | 3R | 1R | 0 / 7 | 5-7 | 42% |
| Win-loss | 0-1 | 0-0 | 1-1 | 0-2 | 2-2 | 1-3 | 2-4 | 3-3 | 2-4 | 0 / 20 | 11-20 | 35% |
6.3. ATP Tour Finals
McDonald has reached one singles final and three doubles finals on the ATP Tour.
6.3.1. Singles: 1 (1 runner-up)
| Result | W-L | Date | Tournament | Tier | Surface | Opponent | Score |
|---|---|---|---|---|---|---|---|
| Loss | 0-1 | August 8, 2021 | Washington Open, United States | ATP 500 | Hard | Jannik Sinner | 5-7, 6-4, 5-7 |
6.3.2. Doubles: 3 (1 title, 2 runner-ups)
| Result | W-L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
|---|---|---|---|---|---|---|---|
| Win | 1-0 | October 9, 2022 | Japan Open, Japan | ATP 500 | Marcelo Melo | Rafael Matos David Vega Hernández | 6-4, 3-6, [10-4] |
| Loss | 1-1 | July 2023 | Washington Open, United States | ATP 500 | Ben Shelton | Máximo González Andrés Molteni | 7-6(7-4), 2-6, [6-10] |
| Loss | 1-2 | August 2024 | Cincinnati Open, United States | Masters 1000 | Alex Michelsen | Marcelo Arévalo Mate Pavić | 2-6, 4-6 |
6.4. ATP Challenger and ITF Futures Finals
McDonald has reached several finals across ATP Challenger and ITF Futures circuits in both singles and doubles.
6.4.1. Singles: 12 (6 titles, 5 runner-ups, 1 pending)
| Result | W-L | Date | Tournament | Tier | Surface | Opponent | Score |
|---|---|---|---|---|---|---|---|
| Loss | 0-1 | September 2015 | USA F26, Claremont | Futures | Hard | Deiton Baughman | 6-2, 3-6, 3-6 |
| Win | 1-1 | September 2016 | USA F29, Irvine | Futures | Hard | Jan Choinski | 6-0, 6-3 |
| Win | 2-1 | January 2017 | USA F1, Los Angeles | Futures | Hard | Carl Söderlund | 6-4, 6-0 |
| Win | 3-1 | October 2017 | Fairfield Challenger, United States | Challenger | Hard | Bradley Klahn | 6-4, 6-2 |
| Loss | 3-2 | January 2018 | RBC Tennis Championships of Dallas, United States | Challenger | Hard (i) | Kei Nishikori | 1-6, 4-6 |
| Win | 4-2 | April 2018 | Seoul Open Challenger, South Korea | Challenger | Hard | Jordan Thompson | 1-6, 6-4, 6-1 |
| Loss | 4-3 | February 2019 | RBC Tennis Championships of Dallas, United States | Challenger | Hard (i) | Mitchell Krueger | 6-4, 6-7(3-7), 1-6 |
| Win | 5-3 | February 2021 | Nur-Sultan Challenger, Kazakhstan | Challenger | Hard (i) | Jurij Rodionov | 6-1, 6-2 |
| Loss | 5-4 | September 2024 | Nonthaburi Challenger, Thailand | Challenger | Hard | Wu Tung-lin | 3-6, 6-7(4-7) |
| Loss | 5-5 | October 2024 | Hangzhou Challenger, China | Challenger | Hard | James Duckworth | 6-2, 6-7(5-7), 4-6 |
| Win | 6-5 | October 2024 | Shenzhen Longhua Open, China | Challenger | Hard | Arthur Cazaux | 6-4, 7-6(7-4) |
| Pending | |||||||
| February 2025 | San Diego Open, United States | Challenger | Hard | Eliot Spizzirri | TBD |
6.4.2. Doubles: 9 (7 titles, 2 runner-ups)
| Result | W-L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
|---|---|---|---|---|---|---|---|---|
| Win | 1-0 | September 2013 | USA F24, Costa Mesa | Futures | Hard | Marcos Giron | Keith-Patrick Crowley Matt Fawcett | 6-3, 6-2 |
| Win | 2-0 | June 2014 | USA F17, Oklahoma City | Futures | Hard | Martin Redlicki | Jesús Bandrés Gonzalo Escobar | 4-6, 7-6(7-3), [10-8] |
| Loss | 2-1 | September 2014 | USA F25, Costa Mesa | Futures | Hard | Martin Redlicki | Nicholas Hunter Junior Alexander Ore | 6-4, 4-6, [8-10] |
| Win | 3-1 | September 2015 | USA F27, Costa Mesa | Futures | Hard | Martin Redlicki | Jean-Yves Aubone Benjamin Lock | 6-2, 3-6, [10-5] |
| Loss | 3-2 | August 2016 | Nordic Naturals Challenger, United States | Challenger | Hard | Ben McLachlan | Nicolaas Scholtz Tucker Vorster | 7-6(7-5), 3-6, [8-10] |
| Win | 4-2 | September 2016 | USA F29, Irvine | Futures | Hard | Deiton Baughman | Timothy Sah Ryan Seggerman | 6-4, 6-3 |
| Win | 5-2 | October 2016 | Fairfield Challenger, United States | Challenger | Hard | Brian Baker | Sekou Bangoura Eric Quigley | 6-3, 6-4 |
| Win | 6-2 | April 2017 | USA F12, Memphis | Futures | Hard | Lloyd Glasspool | Philip Bester Alex Lawson | 6-2, 7-6(7-3) |
| Win | 7-2 | January 2018 | City of Playford Tennis International, Australia | Challenger | Hard | Tommy Paul | Maverick Banes Jason Kubler | 7-6(7-4), 6-4 |
6.5. Wins over Top 10 Players
Mackenzie McDonald has achieved a record of 5 wins and 17 losses against players who were ranked in the top 10 at the time the match was played.
| Season | 2019 | 2020 | 2021 | 2022 | 2023 | Total |
|---|---|---|---|---|---|---|
| Wins | 1 | 0 | 0 | 0 | 4 | 5 |
| # | Player | Rank | Event | Surface | Round | Score | Mackenzie McDonald Ranking |
|---|---|---|---|---|---|---|---|
| 2019 | |||||||
| 1. | Juan Martín del Potro | 4 | Delray Beach Open, United States | Hard | QF | 6-4, 3-6, 7-6(7-5) | 84 |
| 2023 | |||||||
| 2. | Rafael Nadal | 2 | Australian Open, Australia | Hard | 2R | 6-4, 6-4, 7-5 | 65 |
| 3. | Taylor Fritz | 9 | Eastbourne International, United Kingdom | Grass | 2R | 7-6(7-3), 7-6(10-8) | 64 |
| 4. | Andrey Rublev | 7 | Canadian Open, Canada | Hard | 2R | 6-4, 6-3 | 59 |
| 5. | Holger Rune | 5 | Cincinnati Masters, United States | Hard | 2R | 6-4, 2-0 ret. | 43 |
6.6. Best Performances in Major Tournaments
This section summarizes Mackenzie McDonald's best career results in significant tournaments.
| Tournament | Result | Year |
|---|---|---|
| ATP Finals | A | Not qualified |
| Indian Wells Masters | 2R | 2019, 2021, 2022, 2023 |
| Miami Open | 3R | 2022, 2023 |
| Monte-Carlo Masters | 1R | 2023 |
| Madrid Open | 1R | 2023 |
| Italian Open | 1R | 2023, 2024 |
| Canadian Open | QF | 2023 |
| Cincinnati Masters | 3R | 2023 |
| Shanghai Masters | 2R | 2023 |
| Paris Masters | 2R | 2023 |
| Olympic Games | A | Not participated |
| Davis Cup | QF | 2024 |
7. Assessment and Legacy
Mackenzie McDonald's career has been characterized by remarkable resilience and consistent improvement, particularly in overcoming a significant hamstring injury in 2019 to return to top-level competition.
7.1. Positive Assessment and Achievements
McDonald's ability to rebound from a severe injury and re-establish himself on the ATP Tour is a testament to his determination and perseverance. His consistent rise through the rankings, culminating in a career-high of world No. 37 in singles, highlights his steady progress. His notable achievements include winning both singles and doubles titles at the 2016 NCAA Division I Tennis Championships, a rare feat that underscored his exceptional collegiate talent. On the professional tour, reaching his first ATP Tour final at the 2021 Citi Open and securing his maiden ATP doubles title in 2022 demonstrate his competitive prowess. His victory over Rafael Nadal at the 2023 Australian Open, achieved in straight sets, stands out as a significant career highlight, showcasing his ability to compete with the sport's elite. Furthermore, his first Masters 1000 quarterfinal at the 2023 Canadian Open solidified his position as a formidable opponent in major events. McDonald's consistent returns from injury and his dedication were recognized when he was named the ATP Comeback Player of the Year in 2021.
7.2. Criticism and Controversy
No significant criticisms or controversies regarding Mackenzie McDonald's career or conduct have been widely reported or noted in the provided sources. His professional image largely remains one of a hardworking and dedicated athlete.