Sinner lasted just five games before retiring from the Cincinnati Open final against Carlos Alcaraz, with just a week to go before the start of the US Open

Carlos Alcaraz won the Cincinnati Open on Monday after Jannik Sinner was forced to retire due to illness. Alcaraz was already up big on Sinner, the World No. 1, when he had to retire. Sinner told the crowd that he hoped to play after feeling bad overnight, but he couldn't make it work.

Carlos Alcaraz won the Cincinnati Open title in anticlimactic circumstances as rival Jannik Sinner retired due to illness just 23 minutes into the match.