Pakistan, Aug. 11 -- World number one Jannik Sinner has pulled out of the Cincinnati Open with a right knee injury, tournament organisers said on Sunday, handing the Italian a blow in his preparations for this month's US Open.

The 24-year-old Italian, who claimed his fifth Grand Slam title at Wimbledon last month, had also pulled out of the Canadian Open, a key warm-up event for the US Open. Sinner won the Cincinnati title in ?2024 and finished runner-up to seven-times Grand Slam champion Carlos Alcaraz there last year.

"After consulting with my doctors and my team, I have to announce that I need to withdraw from the Masters 1000 tournament in Cincinnati," Sinner said in a statement.

"My right knee has been bothering me and even though...