Usain Bolt's coach Glen Mills believes the Jamaican sprint marvel was on track to run 9.52 seconds in the 100 metres at the Beijing Olympics, had he not eased up to celebrate at the finish.

Bolt clocked 9.69 seconds to win gold in a world record-breaking performance but slowed to celebrate the phenomenal win 10 metres before the finish.

"Bolt's first 60 metres was very good. I was told that with an all-out finish, after the opening 60 metres, Usain was projected to run a 9.52," Mills told reporters ahead of yesterday's Weltklasse Golden League meeting in Zurich, Wednesday evening.

Own standard

"I haven't seen the complete biomechanical report from Beijing yet, but I can say that Usain had a good start by his own standard."

Meanwhile, any doubts as to whether Bolt would continue to run the 100 metres after his incredible season this year were put to rest by Mills.

"This is only his first year of running the 100 metres, his first year with serious work in the event," said Mills.

"In two more years, he should be peaking at this distance and, by then, I am certain he will be down to there (9.50 or faster)."