DOHA, Sept. 28 -- Christian Coleman stormed to win the men's 100m victory, changing his London World Championships silver into gold in Doha on Saturday while Chinese hammer thrower Wang Zheng took her country's first medal here.

Coleman clocked a world leading time of 9.76 seconds in the blue ribbon event as his American compatriot and defending champion Justin Gatlin took silver in 9.89. Andre De Grasse of Canada was third in 9.90.

"I've been blessed with incredible talent and tonight I was able to show it. I have been working incredibly hard and this just makes it all worthwhile," he said.

Coleman paid tribute to his teammate Gatlin, 37, who first won the world championships in 2005 and his Olympic title in 2004.

"Justin Gatlin is a great guy and great competitor. I remember watching him back in 2004 when I was eight years old and to think all these years later I could come and win gold too is a great feeling," he said.

Gatlin praised Coleman and said he would again challenge him in Tokyo.

"Christian has had a spectacular season and I knew he'd be tough to beat. He ran a great race. But I have a message for next year - I'm coming. He'd better be ready," he said.

The United States set the 4X400 meters mixed relay world record in the heat round in 3:12.42, beating the previous best time of 3:13.20 set three years ago in an American local event in Eugene. The mixed relay was included for the first time into the World Championships.

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