Marcos Giron is an American professional tennis player born on July 24, 1993, in Thousand Oaks, California. He turned professional in 2014 and has achieved a career-high singles ranking of world No. 37 as of August 5, 2024.
Giron’s tennis journey includes a notable collegiate career at UCLA, where he won the NCAA Division I Men’s Tennis Singles Championship in 2014. Turning professional thereafter, he has secured one ATP singles title at the 2024 Hall of Fame Open in Newport, defeating Alex Michelsen in the final.
In early 2025, Giron reached the third round of the Australian Open, marking his first victories at the tournament after five previous first-round exits. He was ultimately defeated by defending champion Jannik Sinner in straight sets.
At the 2025 Indian Wells Masters, Giron continued his impressive form by defeating fourth-seeded Casper Ruud in the second round, showcasing his potential on the ATP Tour.