The two best men's players in the world are reconfiguring the sport before their opponents' eyes. They don't know what to do about it

Jannik Sinner will make his official debut in 2025 at the Australian Open tomorrow. The world number 1 will face the Chilean ace Nicolas Jarry in the first round, in a match that could hide some pitfalls. However, there is no doubt that the Italian champion is the top favorite to win at Melbourne Park this year and confirm the title won in 2024.

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