Mackenzie McDonald Bio
Michael Mackenzie Lowe McDonald, known professionally as Mackenzie McDonald, is an American professional tennis player. Born on April 16, 1995, in Piedmont, California, he has built a steady career on the ATP Tour, highlighted by a career-high singles ranking of world No. 37 in October 2023. A former NCAA champion at UCLA, McDonald combines crafty court play with a calm competitive temperament that has earned him wins over several top-ten opponents.
Early Life and Background
Mackenzie McDonald was born and raised in Piedmont, California, a small city in the San Francisco Bay Area. Growing up in a region with a deep tennis tradition, he trained on local courts from a young age and quickly developed into one of the top junior players in the country. He went on to attend UCLA, one of the most storied programs in American collegiate tennis.
During his time in Westwood, McDonald became one of the most decorated players in program history. As a freshman in 2014, he was named a Singles All-American and Pac-12 Freshman of the Year. He continued to develop through his sophomore and junior seasons, ultimately reaching the pinnacle of college tennis in 2016.
Path to Tennis
McDonald’s junior career gave early signs of his professional potential. In 2012, he reached the semifinals of the boys’ singles draw at the Australian Open and climbed as high as No. 12 in the ITF World Junior Rankings. That same year, he won the 18s singles title at the Easter Bowl, and in 2013 he won the men’s singles title at the historic Ojai Tennis Tournament.
While still a teenager, McDonald qualified for the 2013 Western and Southern Open by defeating two top-100 players despite having no ATP ranking points. He became the first unranked teenager to qualify for an ATP Masters 1000 event since 1995. He was also granted a wildcard into the US Open qualifying draw that year, signaling the start of a rapid rise through the ranks.
Mackenzie McDonald Career
College Career and NCAA Titles (2014–2016)
McDonald’s time at UCLA was transformative. After being named the No. 1 incoming college player by the ITA in 2014, he helped lead the Bruins to deep NCAA tournament runs over three seasons. His most memorable moment came in 2016, when he defeated top-ranked Mikael Torpegaard of Ohio State to win the NCAA singles championship in Tulsa, Oklahoma.
Just days later, McDonald partnered with Martin Redlicki to capture the NCAA doubles title as well, becoming the first player since 2001 to sweep both NCAA singles and doubles crowns in the same year. Shortly after, he announced that he would forgo his senior season and turn professional.
Early Professional Career (2016–2018)
McDonald made his Grand Slam debut at the 2016 US Open on a wildcard, losing in five sets to Jan Šátral in the first round. He quickly found success on the ITF Pro Circuit, winning his first Futures title later that fall. In 2017, he won the F1 Los Angeles Pro Futures and was awarded the Oracle US Tennis Award in recognition of his transition to the professional ranks.
By 2018, McDonald had cracked the ATP top 100. He reached his first Grand Slam third round at Wimbledon, defeating Nicolás Jarry and Guido Pella before falling to Milos Raonic. Earlier that season, he played his first Australian Open main draw, falling in a five-set battle with Grigor Dimitrov.
First Top-10 Win and Injury Setback (2019)
McDonald opened 2019 in strong form, reaching the semifinals of the Delray Beach Open, where he defeated former US Open champion Juan Martín del Potro for his first career top-10 win. The result propelled him to a then career-high ranking of No. 62 in the world.
His momentum was halted at the 2019 French Open, when he suffered a serious hamstring injury during a doubles match that forced him to miss the rest of the season. The setback dropped him out of the top 100.
Comeback and Maiden ATP Final (2021–2022)
McDonald returned to form in 2021, highlighted by a run to the fourth round of the Australian Open, where he upset 22nd seed Borna Ćorić before losing to Daniil Medvedev. Later that summer, he reached his first ATP final at the Citi Open in Washington, D.C., defeating defending champion Nick Kyrgios and Kei Nishikori before falling to Jannik Sinner in the championship match.
In 2022, McDonald broke into the ATP top 50 for the first time. He also won his maiden ATP doubles title at the Rakuten Japan Open, partnering Marcelo Melo. He finished the year ranked No. 63 in singles.
Breakthrough Season (2023)
McDonald’s 2023 season was his most consistent at the top level. He defeated Rafael Nadal in the second round of the Australian Open and reached his first Masters 1000 quarterfinal at the National Bank Open in Toronto, upsetting Andrey Rublev and Milos Raonic along the way. He also reached a career-high singles ranking of world No. 37 in October.
He recorded his 100th career win at the Rolex Paris Masters over compatriot J. J. Wolf and represented the United States in Davis Cup competition, helping the team defeat Uzbekistan in qualifying.
Recent Seasons (2024–2025)
McDonald continued to compete on the ATP Tour in 2024, working to remain inside the top 50. He entered 2025 focused on improving his results at the Masters and Grand Slam events. With his ranking established near the top 40, he remains a regular presence in main draws at ATP 250, 500 and Masters 1000 events.
Notable Events and Milestones
McDonald’s signature moments include his 2016 NCAA doubles sweep, his first ATP title run at the 2022 Rakuten Japan Open, his defeat of Rafael Nadal at the 2023 Australian Open, and his first Masters 1000 quarterfinal at the 2023 Canadian Open. He also reached his maiden ATP singles final at the 2021 Citi Open.
Mackenzie McDonald Career Wins
McDonald has compiled a steady collection of titles across the ITF Pro Circuit, ATP Challenger Tour and ATP Tour. His career includes six Challenger singles titles and one ATP doubles title, along with multiple ITF Futures crowns in his development years.
Singles Wins
McDonald earned his first ATP Challenger title in 2021 at the Nur-Sultan Challenger, defeating Jurij Rodionov in the final. His best ATP-level result remains his runner-up finish at the 2021 Citi Open, where he fell to Jannik Sinner.
Mackenzie McDonald Family
Personal Life
McDonald, nicknamed “Mackie,” is of Chinese, Scottish and English descent. He resides in Lake Nona, a community in Orlando, Florida. In April 2025, he became engaged to fellow professional tennis player Maria Mateas.
2025 Season Performance
McDonald entered 2025 aiming to build on the momentum from his career-best 2023 campaign. Competing across the ATP Tour and Grand Slams, he has continued to log wins against top opponents while targeting deeper runs at Masters 1000 events. His established baseline game and improving net play have made him a consistent threat on hard courts.
With veteran experience and a current ranking near the top 40, McDonald remains well-positioned to qualify for the major events throughout the season. His partnership with coach Jaime Pulgar García continues to refine his tactical approach, particularly on faster surfaces.