SAINT-DENIS, France - American sprinter Kelli White could be stripped of her two gold medals from the World Championships for testing positive for a stimulant.
The IAAF, the sport's governing body, said Saturday it was investigating whether White committed a doping offense and should forfeit her victories in the 100 and 200 meters. In addition, she could face a two-year suspension.
White, the first American to win both sprints at a world championship, said she took a medication for a sleep disorder.
"I know that I did nothing wrong and sought no advantage over my competitors," White said at a news conference. "I am confident that things will work out in the end."
IAAF general secretary Istvan Gyulai said "at the moment all indications" point toward the matter being ruled a doping case, which would result in White's disqualification.
White pulled out of the women's 400-meter relay final, saying she did not want to distract her teammates. France beat the American team for the gold.
With Torri Edwards running anchor instead of White, Christine Arron blew past her in the final straightaway to give France the gold in 41.78 seconds. The U.S. team was second in 41.83.
IAAF vice president Arne Ljungqvist, the federation's anti-doping chief, said White tested positive for the stimulant modafinil after Sunday's 100-meter final.
White said she took the drug Provigil, which contains modafinil, to treat narcolepsy. She said the drug was prescribed by her doctor.
Also Saturday, Allen Johnson became the first four-time world champion in the 110-meter hurdles, finishing in 13.12 seconds to edge U.S. teammate Terrence Trammell by eight-hundredths of a second.UNIVERSITY GAMES: China assured top spot
China won 13 finals to ensure its top spot in the standings in Daegu, South Korea. The United States has 34 medals and will finish with its fewest at the games since 1989, when it had 26. In swimming, Olympic and world champion Yana Klochkova of Ukraine won the 200-meter butterfly for her fourth gold medal. Florida's Maureen Farrell was fourth in the 200 backstroke and Gators teammate Jan Wolfgarten was fifth in the 1,500 freestyle.HORSE RACING: Jockey sets record
John Velazquez won his 56th race at Saratoga Race Course, breaking the single-season track record. Velazquez rode Lightning Lyla to victory in the second race. The previous record was set by Jerry Bailey in 2001. In a later race, Silver Wagon outran heavily favored Chapel Royal, ridden by Velazquez, down the stretch to win the Hopeful Stakes for 2-year-olds by four lengths. Silver Wagon, ridden by Bailey, covered the 7 furlongs in 1:23.47.
DEL MAR DEBUTANTE: Halfbridled, a daughter of 1990 Kentucky Derby winner Unbridled, won the race for 2-year-old fillies by five lengths. Julie Krone was in the saddle as Halfbridled finished in 1:22.20 to earn $150,000.SOCCER: Beckham wastes no time
David Beckham took just two minutes to score in his Spanish league debut, getting a goal in defending champion Real Madrid's 2-1 victory over Real Betis in the opener. It was his third goal in eight games with Real Madrid.
MLS: Chris Brown scored three goals as host New England snapped a nine-match winless streak with a 5-1 win over Chicago.
BRAZIL WINS TITLE: Brazil defeated Spain 1-0 on a seventh-minute goal by Leonardo to win the FIFA Under-17 world championship in Helsinki, Finland.ET CETERA
VOLLEYBALL: Aury Cruz scored 21 points on 16 kills as Florida (4-1) defeated Brigham Young 30-24, 30-19, 30-21. ... Junior Shameka Mitchell had 25 kills as South Florida (2-1) outlasted Georgia for an 18-30, 30-22, 22-30, 30-27, 15-12 win. She had 17 kills as USF defeated Stetson 30-21, 30-21, 30-19 earlier in the day. ... Sophomore Brittany Kauss had a career-high 20 kills for Eckerd (3-0) in a 32-34, 30-19, 30-20, 30-20 win against Mount Olive College. ... Aisha Carr had 10 kills as Florida State (2-1) beat Michigan 30-22, 30-25, 21-30, 30-21.
CYCLING: Barry Forde of Barbados, who won two gold medals at the Pan Am Games, tested positive for the stimulant ephedrine.
BOXING: Wladimir Klitschko (42-1) stopped Fabio Moli (29-3) 97 seconds into their heavyweight fight in Munich, Germany.
ROWING: The United States won gold medals in the women's coxless four and men's coxed pairs at the world championships in Milan, Italy.