THESSALONIKI, GREECE - SEPTEMBER 12:  Allyson Felix of USA signs autographs after victory in the women's 200m  during day one of the IAAF World Athletics Final at the Kaftanzoglio Stadium on September 12, 2009 in Thessaloniki, Greece. Getty Images logo Getty Images 2 months ago

THESSALONIKI, GREECE - SEPTEMBER 12: Allyson Felix of USA signs autographs after victory in the women's 200m during day one of the IAAF World Athletics Final at the Kaftanzoglio Stadium on September 12, 2009 in Thessaloniki, Greece.