Sinner ramped up training for Wimbledon defense

Jannik Sinner has ramped up his Wimbledon preparation after the collapse he suffered in Paris. He said he has reworked his fitness for warmer conditions as he gets ready to defend his Wimbledon title, while also confirming he underwent testing after the French Open episode. The practical consequence is that his health and recovery remain a central issue heading into his title defense, even after a grass-court exhibition win over Cameron Norrie.