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,

- Italy’s Jannik Sinner returns the ball to Netherlands’ Tallon Griekspoor during the Davis Cup final tennis match between Netherlands and Italy at the Martin Carpena Sports Hall in Malaga, southern Spain,

Four-times Grand Slam champion Carlos Alcaraz said having a rival like world number one Jannik Sinner was good for his game as it pushes him to be at his best every time he walks on court. Alcaraz won the French Open and Wimbledon titles last year while Sinner claimed the Australian Open and U.