Updated at 12:23 pm on 4 May 2012
The triple Olympic champion Usain Bolt could have an unexpected challenger when the Jamaican world record holder runs his first 100 metres of the year this weekend.
Asafa Powell, who held the world record before Bolt became athletics' biggest star, is considering switching from the 200 to the 100 at the Jamaica International Invitational because of a minor groin injury.
With the London Olympics less than 85 days away, Bolt is hoping to make the race a test of his preparations with or without Powell.
His only race of the season has been a 4x100 metre relay.
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