13th IAAF World Athletics Championships Daegu 2011 - Day Seven [Getty Images]

DAEGU, SOUTH KOREA - SEPTEMBER 02: Caster Semenya of South Africa, Ekaterina Kostetskaya of Russia and Kenia Sinclair of Jamaica compete in the women's 800 metres semi finals during day seven of 13th IAAF World Athletics Championships at Daegu Stadium on September 2, 2011 in Daegu, South Korea. (Photo by Michael Steele/Getty Images)

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