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

There was an unknown factor about Jannik Sinner's condition after the problems he had during the match against Holger Rune at the 2025 Australian Open. The world No.1 swept away any doubts by demolishing Alex de Minaur in the last quarterfinal and reached the semifinals of the Happy Slam, where he will try to defend the title he won last year.

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. He's also got his young rival,