Tennis star Rafael Nadal has withdrawn from the London 2012 Olympics.
The Spaniard said in a statement it is one of the saddest moment so of his career, but he is "not in condition" to compete in the event staged at Wimbledon as his knee problems continue.
Like footballer Owen Hargreaves, Nadal suffers from tendinitis in both of his knees and has also suffered the tendon inflammation in his elbow before.
Nadal won gold at the 2008 Games in Beijing when he followed up his enthralling five-set Wimbledon win over Roger Federer with the defeat of Novak Djokovic.
He ended Djokovic's domination of the men's singles this year when he beat the Serb in the French Open final at Roland Garros in June, however he lost in the second-round of Wimbledon at the hands of world number 100 Lukas Rosol.
Philipp Kohlschreiber also knocked Nadal out at the third round stage of the Gerry Weber Open in preparation for Wimbledon.
World number three Nadal has won 11 Grand Slams in his career and has won twice at the SW19 Championships.