{image-federer thotte_23032008.jpg news.oneindia.in}Washington, March 23: World number one Roger Federer and Rafael Nadal both conceded defeats in the semifinals of the Pacific Life Open tennis tournaments on Saturday.

Unseeded American Mardy Fish, a former top-20 player now ranked98th in the world, blew past the Swiss 6-3, 6-2 after Nadal was swept by Australian Open champion Novak Djokovic with the same score. Could have served better, sure. Could have returned better, sure," Federer said after the match. "But the guy was on top of his game. He took his chances." Federer, who has reigned as the world number one since 2004, has made an uncharacteristically slow start to the season, still searching for his first title of 2008.

A 12-time Grand Slam champion, he fell in the semi-finals of the Australian Open and was ousted

in the first round at Dubai by Briton Andy Murray. Earlier, Djokovic, 20, broke Nadal twice in each set to secure victory in one hour 28 minutes.

"I played really well and tactically I played really smart," the 20-year-old Serb said. "I knew that I had to be aggressive, take control of the match and try to go for the shots, which I did."

Nadal beat Djokovic 6-2, 7-5 in last year's final.

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