BASEL: Seventeen-time Grand Slam winner Roger Federer underwent "successful" surgery on his knee Wednesday and will be ruled out of action for one month, his agent said.
SYDNEY: Test skipper Steve Smith said Sunday he would play on despite niggling injuries and intended to turn out in all of Australia's international games this season.
LONDON: Australia's injury-plagued fast bowler Ryan Harris has retired from all forms of cricket with immediate effect, Cricket Australia announced on Saturday.
BEIJING: World number one Serena Williams pulled out of the China Open hours before her quarter-final against Sam Stosur on Friday because of an injury to her left knee, the WTA said.
BEIJING: China's Li Na, Asia's only grand slam singles champion, announced her retirement from tennis on Friday, citing the effect of long-term injuries, especially her knees.