Federer aims for another U.S. Open title

NEW YORK (Reuters) - Roger Federer launches his bid for a fifth consecutive U.S. Open title on Tuesday when he plays Argentine Maximo Gonzalez in the first round.

The Swiss, who lost his number one ranking to Rafael Nadal earlier this month, is bidding to win his first grand-slam title of the year, having lost to the Spaniard in the final at both the French Open and Wimbledon.

For the first time in four years, Federer is not the tournament favourite at Flushing Meadows but the 27-year-old is pinning his hopes on experience.

"I still believe it's an advantage if you know how to win a U.S. Open," the world number two said.

"It's a tough tournament to win. Rafa has never been beyond the quarters, so that's definitely the advantage I carry to the other players."

Former champion Marat Safin and 12th seed Richard Gasquet are among the other men in action on day two.

On the women's side, top seed Ana Ivanovic, looking for her first U.S. Open title, plays Russian Vera Dushevina in round one, while sixth seed Dinara Safina faces American Kristie Haerim Ahn.

Former champion Serena Williams ad her sister Venus also begin their title campaigns on Tuesday.

Fourth seed Serena, beaten by her sister in the Wimbledon final, takes on Kateryna Bondarenko of Ukraine, while seventh-seeded Venus faces Australian Samantha Stosur.

The siblings, who won the gold medal in the doubles event at the Beijing Games earlier this month, are seeded to meet each other in the quarter-finals.

"Obviously we had an unbelievable summer," Venus said. "We are trying to make sure that one of us ends the summer off with a bang."

(Editing by Mark Lamport-Stokes)