Tyson Gay ran 19.74 seconds to win the 200m and complete a sprint double at the United States National Outdoor Championships.

Two days after beating Justin Gatlin with a world-leading time of 9.75secs in the 100m, he held off Isiah Young (19.86s) and Curtis Mitchell (19.99) in the event which also doubles as the US trials for the World Championships, setting up a double battle with Usain Bolt in Moscow.

"It feels good to do that, I am happy to be healthy, happy that my team-mate made it," Gay told wwwusatf.org. "Curtis Mitchell is my training partner - I'm definitely happy that he made it."

Bolt won the 100m in the Jamaican national trials on Friday and qualifies automatically as defending champion in the 200m.