SPORTS briefs

BERLIN. Nigerian hurdler Amaka Ogoegbunam has tested positive for steroids at the world championships and has been provisionally suspended. He is the second athlete to fail his drug test at the worlds following steeplechaser Jamal Chatbi of Morocco. Ogoegbunam was disqualified from the semifinals of the 400-meter hurdles Tuesday. Track and field's governing body says Ogoegbunam tested positive for the anabolic steroid metenolone after the race.

VALENCIA. Red Bull has moved to head off Ferrari and other Formula One teams by extending Sebastian Vettel's contract to the end of the 2011 season. Red Bull announced the new deal Friday, with the fresh contract replacing the previous one which tied the 22-year-old German to the team until the end of 2010. The new contract includes an option for the 2012 season.

MANCHESTER. Manchester United announced Friday they would have to do without central defender Rio Ferdinand for another three to four weeks. He suffered a minor muscle tear in his thigh last week and was set to be sidelined for two weeks.

MADRID. Real Madrid have sold highly-fancied striker Alvaro Negredo to Spanish league rivals Sevilla, both clubs announced Friday. Negredo heads to the southern coast club for five years but for the first two years of that deal Real, who have recently signed a string of top forwards including Kaka, Karim Benzema and Cristiano Ronaldo, have the option to buy the player back.

NEW YORK. Pittsburgh Steelers quarterback Ben Roethlisberger injured his right foot during the final practice of training camp, the team said Thursday. Left tackle Max Starks apparently stepped on Roethlisberger's foot while trying to block linebacker James Harrison.

NEW JERSEY. Tiger Woods has entered The Barclays next week, an indication that the world's No. 1 player plans to compete in all four FedEx Cup playoff events for the first time. Woods is assured of being the No. 1 seed when the PGA Tour playoffs begin Thursday. Woods skipped the opening playoff event the first year of the FedEx Cup in 2007, won the last two tournaments and easily captured the $10 million bonus prize.