Despite an increasingly public profile, tennis superstar Coco Gauff continues to hold serve when it comes to keeping the identity of her boyfriend a mystery. Gauff, the defending U.S. Open champion who won her first Grand Slam doubles' title in June, has preached the importance of keeping her off-the-court life private. "I think I felt like I just, some parts of myself I love to share and then some parts I think I just keep to myself," she told People in March 2024.