Brad Guzan's Olympic dream is over after the USA slipped to a 2-1 group defeat against Nigeria in Beijing.

The Villa keeper performed heroically for his country but the Americans were effectively undone by the fourth minute dismissal of defender Michael Orozcov.

Promise Isaac gave Nigeria the lead late in the first-half and Victor Nsofor Obinna scored the winner in the 79th minute.

A Sacha Kljestan penalty two minutes from time raised US hopes of a dramatic comeback but the Nigerians held on for victory.

Today's result means Guzan is now free to begin his Villa career.