Cincinnati, Aug. 9 -- Reigning Wimbledon champion and five-time Grand Slam champion Jannik Sinner has pulled out of Cincinnati Open due to an injury to his right knee.

The official X handle of the tournament made the announcement, leaving the tournament without two of the brightest young superstars of the modern era, Sinner and his arch-rival Carlos Alcaraz.

"Jannik Sinner has withdrawn from the Cincinnati Open due to a right knee injury. Wishing all the best to our 2024 champion, and can't wait to see you again next year!," posted the tournament's official handle.

Sinner had captured the 2024 title, beating Frances Tiafoe in the final, 7-6 (7-4), 6-2.

Alcaraz's return to competitive tennis has been delayed after the Spaniard star wit...