BEIJING — A year ago, Tyson Gay was on top of the world. He outdueled Jamaica's Asafa Powell in the 100-meter final at the 2007 IAAF World Athletics Championships in Osaka. He also took home gold medals in the 200 and 4x100-relay as well.

On Saturday, he coped with the experience of athletic failure on the sport's biggest stage.

The American star failed to qualify for the 100 final at National Stadium in the Beijing Olympics. He ran the second semifinal from Lane 9 in 10.05 seconds and placed ifth, tying Caribbean sprinter, Kim Collins of Saint Kitts and Nevis, for ninth overall.