Serena Williams tweaked knee during singles return, agent says

Serena Williams' status to play in women's doubles at Wimbledon is uncertain after she suffered a knee injury during her first singles match in nearly four years.

Williams' agent, Jill Smoller, released a statement Wednesday saying Williams "tweaked her right knee at the end of the first set" of her first-round loss to Maya Joint on Tuesday. Smoller added that was the reason Williams did not speak with reporters after her match, saying she was excused by the Wimbledon and WTA medical teams.

"She left site that night unaided and is doing everything she can to be ready for her doubles match later this week," Smoller said.