 Tennis great Serena Williams limped out of Wimbledon in tears on Tuesday after a right leg injury forced her retirement early in a first round match against unseeded Belarusian Alea Sandović. The American sixth seed, a seven-time champion bidding for a record equal in 24th Grand Slam singer's crown, was clearly in pain early in the first set on a slippery center court and limped off for treatment while 3-2 ahead. The 39-year-old who had been 3-1 up before the injury sank to the grass sobbing before being helped off the court.