Cincinnati, Aug. 19 -- World No. 2 Carlos Alcaraz clinched the 2025 Cincinnati Open title on Monday as his opponent, Italy's Jannik Sinner, retired from the game after playing five games of the first set.

In the fourth final meeting of the 2025 season the typically steady Sinner dropped his opening service game at love. Alcaraz went on to win four more games in a row before the Italian called the trainer during the changeover.

Minutes later, the world's No. 1 player retired from the match. The two players - who have relished their rivalry - exchanged words, with Alcaraz putting his arm around his opponent and looking visibly concerned for Sinner's health, as per Olympics.com.

"Sorry, Jannik. That wasn't the way to win matches, to win t...