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.

Jannik Sinner was forced to retire after just 26 minutes of the Cincinnati Open final against Carlos Alcaraz, with the Italian apologizing to fans after the match

US Open champion Jannik Sinner has provided a scare before next week's tournament after he retired from the Cincinnati Open final against Carlos Alcaraz. Sinner was only on court for 24 minutes, but was out of sorts in hot conditions in Ohio and broken three times by rival Alcaraz to trail 5-0.