Shawn Crawford has pulled out of the 200m at the World Championships in Helsinki because of a persistent foot injury, according to his agent.
Crawford's absence is a boost for Wallace Spearmon
The American, Olympic champion at the distance in Athens in 2004, will still compete in the 100m at the Worlds.
"Shawn will only compete in the 100m and the relay," said Kimberly Trammell.
His withdrawal frees up a place for Wallace Spearmon, who came only fourth in the US trials but ran a year's best time of 19.89 seconds on Friday.