Jannik Sinner, the world’s No. 1 men’s tennis player, withdrew from the Cincinnati Open on Sunday because of a knee injury.
Sinner, who hasn’t competed since capturing his second straight Wimbledon title last month, also withdrew from the tournament in Toronto that began Wednesday.
The 24-year-old Sinner has five Grand Slam titles and just needs to win the French Open to complete the career Grand Slam.
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