LOS ANGELES — Tim Floyd suddenly resigned as basketball coach at Southern California Tuesday following allegations that he gave $1,000 in cash to a man who helped steer former star player O.J. Mayo to the Trojans.

Floyd submitted a one-paragraph letter to USC athletic director Mike Garrett saying he was quitting after four seasons because he no longer had full enthusiasm for his job.

Last month, YahooSports.com reported that Louis Johnson, a former associate of Mayo's, told federal and NCAA investigators that Floyd paid to have Mayo sign with the Trojans.

MADRID — Rafael Nadal will travel to London next Tuesday in hopes of defending his Wimbledon title despite having played with pain in his knees for months.The top-ranked Spaniard said in a statement Tuesday after undergoing medical tests in Barcelona he has decided to try physical therapy to prepare for the tournament, which starts June 22.Nadal, who has tendinitis in both knees, withdrew from a grass-court warmup event at Queen's Club this week.