But the 21-year-old was only fifth in the final, won by American Michael Rodgers in 6.57 ahead of Antiguan Daniel Bailey.

BBC: Jenny Meadows breaks Kelly Holmes' GB indoor 800 record

Gatlin won the 100 meters at the Diamond League meet in a wind-aided time of 9.88 seconds, besting fellow Americans Michael Rodgers and Ryan Bailey.

NPR: Gatlin Wins 100 At The Prefontaine Classic

During the winter Chambers had already set a season-best mark of 6.51s, equalling the time of American Michael Rodgers, and he was a huge favourite for Sunday's final.

BBC: Chambers storms to gold in Turin

In the absence of the world's three fastest men - world and Olympic outdoors champion Usain Bolt, American Tyson Gay and Jamaican Asafa Powell - the United States team would have hoped for high podium positions for Williams and compatriot Michael Rodgers.

BBC: Ivory Williams ban boosts gold hopes for Dwain Chambers