Saint-Denis, France ? Tim Montgomery was too slow. Maurice Greene was too lame.

While America’s fastest men faltered, a laid-back sprinter from a tiny Caribbean nation won the men’s 100 meters Monday at the World Championships.

On a day of disappointment and discipline for Americans, Kim Collins of St. Kitts and Nevis was crowned world champ.

Collins won in a leisurely 10.07 seconds — a fifth of a second slower than Montgomery’s world record time. Darrel Brown of Trinidad and Tobago won silver and Darren Campbell of Britain was third, both timed in 10.08.

Kansas City, Kan., native Greene’s six-year reign as 100-meter champion ended in pain when he hobbled across the finish line next-to-last in his semifinal heat.

Also dethroned was U.S. pole vaulter Stacy Dragila, who won the only two previous world crowns but failed to win a medal this time. She tied for fourth.

At the same time, track and field’s world governing body ordered U.S. team officials to punish sprinter Jon Drummond by tonight for his tantrum in Sunday’s 100 quarterfinals.

Greene started fast in his semifinal heat but slowed midway through the race. Greene grabbed his left leg as soon as he crossed the finish line.

“I got a great start and from my start I just felt my quad muscle pop,” Greene said. “I just kept trying to go through it, but it just kept getting worse and worse as I went down the track.”

Greene, who does not expect to run on the U.S. 400-meter relay team, had hoped for an unprecedented fourth 100 title.

“Right now my soul hurts, because I hate to give it up like that,” he said of his crown.