When Carlos Alcaraz is on court for a training session, perhaps working on his newly revamped service motion, he's doing so to buttress a game already good enough to claim four Grand Slam titles.

Alcaraz won the French Open and Wimbledon titles last year while Sinner claimed the Australian Open and U.S. Open trophies.

Though a doping investigation cast a shadow over the middle part of Jannik Sinner's season and the World Anti-Doping Agency is appealing the verdict of no wrongdoing in that case, 2024 was Sinner's ye