THESSALONIKI, GREECE - SEPTEMBER 13:  Sanya Richards of USA wins the Womens 400 metres during day two of the IAAF World Athletics Final at the Kaftanzoglio stadium on September 13, 2009 in Thessaloniki, Greece. Getty Images logo Getty Images 2 months ago

THESSALONIKI, GREECE - SEPTEMBER 13: Sanya Richards of USA wins the Womens 400 metres during day two of the IAAF World Athletics Final at the Kaftanzoglio stadium on September 13, 2009 in Thessaloniki, Greece.