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

The ATP calendar is very long and the first Grand Slam of the season represents only an appetizer of a long series of tournaments that will characterize a very important season for several top players.

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