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.

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

Jannik Sinner will go into his Australian Open defence knowing a court hearing in Switzerland in three months could condemn him to a potential two-year ban from the game for doping.