Injured Powell to miss London GP

Diamond League - London Grand Prix
Venue: Crystal Palace Dates: 13-14 August
Coverage: Watch Live on BBC 2 (Friday 1800-2100 BST) and BBC 1 (Saturday 1300-1630 BST) and BBC Sport website (UK users only); coverage on BBC Radio 5 live, BBC Red Button and BBC Sport website Full details

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Powell has been struggling with a series of injuries in recent weeks

Asafa Powell has pulled out of the 100m at the Diamond League meeting in London on Friday because of injury.

The Jamaican former world record holder has a back problem that also led to him withdrawing from last Friday's Diamond League meeting in Stockholm.

The 27-year-old said he has had a series of injuries linked to an initial groin problem and that he was monitoring his fitness "day by day".

Tyson Gay is now the only star sprinter competing at the London Grand Prix.

The two-day meeting begins at Crystal Palace on Friday.

World and Olympic 100m champion Usain Bolt had already decided not to compete at the event before his season was ended by a back injury earlier this week.

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