Off Track ..... Johnson says Bolt can break 400m best too

Michael Johnson lost his 200m world record to an extraordinary run by new Olympic double sprint champion Usain Bolt on Wednesday and predicted the big Jamaican could now take his 400 mark too.

Johnson, who won the 200m and 400m double at the 1996 Atlanta Games, was as impressed as anyone in the 91,000 capacity Bird's Nest crowd when Bolt shaved two hundredths of a second off his previous 200m world best to win gold again.

"It's incredible. It leaves you speechless but yes, I did (think he would break my record)," the American told Reuters."He needs to set himself some other goals. He could be world record holder in 100, 200 and 400."