Li Na, who lost a three setter to Agnieszka Radwanska in the Wimbledon quarterfinals, said she had no idea that a serve she hit on set point in the first set was close enough to the line to warrant a challenge. Li failed to challenge the call. Television replay showed the serve was good and would have given Li the opening set had she challenged.

“Was in?” Li asked a reporter. “Thanks. I mean, thanks for giving me information. Why you should tell me now? Okay, so, I mean, wow.  So, okay, I got information. Next time I will challenge it for sure.”