Beijing Olympics 100 metres hurdles champion Dawn Harper-Nelson has been banned for three months after she tested positive for the banned diuretic hydrochlorothiazide, the United States Anti-Doping Agency (USADA) said on Tuesday.
A group of US athletes protested on Twitter on Sunday over curbs on appearing in commercials during the Olympics in what looked like a concerted challenge to rules designed to protect Games sponsors.
Ivan Ukhov of Russia won the high jump in cold conditions and a light drizzle at the London Olympics on Tuesday.
Intake of nutrient-rich foods is crucial.
Brianna Rollins of the United States won the 100 metres hurdles gold in a time of 12.48 seconds on Wednesday, leading compatriots Nia Ali and Kristi Castlin in the event's first ever Olympic podium sweep.
A summary of sports events and persons who made news on Monday.
Summary of sports events and persons who made news on Tuesday.
American champion Tyson Gay continued his impressive buildup to next month's World championships on Thursday by winning the 100 metres at Lausanne's Athletissima Diamond League meeting in 9.79 seconds.
Usain Bolt answered questions over his fitness ahead of the world championships with a season's best of 9.87 seconds in the 100 metres with a workmanlike performance at the London Anniversary Games on Friday.
Justin Gatlin blasted out a warning that he is ready to challenge Usain Bolt's 100 metres hegemony when he stormed to a lifetime best 9.74 seconds to win the event in the opening Diamond League meeting of the season on Friday.
Tyson Gay overcame Olympic bronze medallist Justin Gatlin's quicker start and sped to the year's fastest 100 metres, clocking 9.75 seconds at the US trials for the World championships on Friday.
Ethiopia's Genzebe Dibaba eased through to the finals of the women's 5,000 metres on Thursday to stay on course for a world athletics championships double, while American Brittney Reese saw her six-year long jump reign end.
Australia's Sally Pearson completed one of the great sporting comebacks when she overcame two years of injury agony to win the world 100 metres hurdles title at the age of 30.
American swimmer Michael Phelps, the most decorated Olympian of all time, said on Tuesday he hopes this year's Rio Olympics can help heal a sports world hit by recent doping and corruption cases.
Hansle Parchment of Jamaica was second in 13.03 and Olympic champion and world record holder Aries Merritt claimed bronze in 13.04 seconds.
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