Australian Open 2025: Carlos Alcaraz and Jannik Sinner have a real rivalry atop men's tennis

MELBOURNE, Australia (AP) — 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, Jannik Sinner, in mind. ...