Isner Withdraws From Winston-Salem Quarters With Sprained Ankle
Top-ranked American and the number one seed in the Winston-Salem open John Isner was forced to withdraw from his quarterfinal match with Lukas Rosol just hours before the match because of a sprained ankle. “I can’t risk further injury with the U.S. Open right around the corner,” said Isner, who injured the ankle in his…

