THESSALONIKI, GREECE - SEPTEMBER 12:  Tyson Gay of USA (C) beats Asafa Powell (r) of Jamiaca to win the Men's 100 metres 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 3 months ago

THESSALONIKI, GREECE - SEPTEMBER 12: Tyson Gay of USA (C) beats Asafa Powell (r) of Jamiaca to win the Men's 100 metres during day one of the IAAF World Athletics Final at the Kaftanzoglio stadium on September 12, 2009 in Thessaloniki, Greece.