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

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,

Carlos Alcaraz is looking for the only Grand Slam he has not yet won: the Australian Open. The young Spanish player has been winning at least one major a year since 2022. He starte