Justin Gatlin of the United States won the 100 meters in 9.93 seconds on Wednesday at a meet in Daegu, South Korea.
American sprinter Carmelita Jeter won the 100, covering the distance in 11.11 seconds and extending her yearlong domination of the event ahead of the London Olympics this summer.
Gatlin is a 2004 Olympic gold medalist. He is set to lead the American challenge of world-record holder Usain Bolt and his Jamaican team at the London Games. Bolt skipped the Daegu meet.
Americans have dominated sprint and hurdles races with Aries Merritt taking the 110-meter hurdles in 13.21 seconds, and Dawn Harper winning the 100 hurdles in 12.65 seconds.