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.

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

Jannik Sinner was forced to retire from the Cincinnati Open final against Carlos Alcaraz due to an illness, forcing him to withdraw from the US Open mixed doubles as well.