Jannik Sinner has labelled Carlos Alcaraz and Novak Djokovic’s rivalry as "the best in tennis" after the pair played each other at the Australian Open.

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