Tyson Gay, the top U.S. hopeful in the 100-meter dash, just failed to get out of the semifinals in his heat.
Gay, trying to recover from a hamstring injury suffered at Olympic Trials, looked like he was laboring in the race. The top four advance in each of the two semifinal heats, and Gay finished fifth. Two other Americans -- Walter Dix and Darvis Patton -- did make it to the final.
The heavy favorite in the 100 final -- the race that popularly terms "The World's Fastest Man" -- will be Jamaicans Usain Bolt and Asafa Powell. They both ran so smoothly to win their respective semifinal heats. It'd be an upset if they didn't go 1-2.