Athletics: World 100m champion Tyson Gay will not go head-to-head with world record-holder Asafa Powell at Friday's IAAF Golden League meeting in Brussels because of injury.
American Gay, who decisively beat his Jamaican rival to win last month's world title, has pulled out of a re-match in the Belgian capital as he is still struggling with a sore hamstring.
He will also miss a 200m showdown against Usain Bolt, whom he beat to claim a second gold medal in Osaka.
Hopes were never high that Powell, who lowered his world record by three-hundredths-of-a-second to 9.74 seconds in Rieti last Sunday, and Gay would meet again.
Gay, who also won a 4x100m relay gold medal in Japan, missed both the 100m and 200m in the Zurich Golden League meeting last Friday.
Wilfried Meert, the meeting organiser in Brussels, said: "Tyson Gay has everything to lose and nothing to gain.
"He has not fully recovered physically or mentally after his busy programme at the World Championships."