In a statement from the organizers of the two-day meeting at Crystal Palace, Powell said he was unwilling to risk running so close to the world championships.
“I’ve had some tightness in my groin since (competing in) Budapest (last week), I had hoped that it would have cleared by now but it’s still there,” Powell said. “I’ve been seeking treatment but had to make the decision today to withdraw.
“I am focusing on Daegu and as much as I’d like to run tonight, I just can’t take the risk with the major championships three weeks away.”
“It’s a tough decision as I always love to run in London, the fans here are incredible and I want to thank them for their support,” added the former world record holder.
The 28-year-old is the quickest man in the world over 100m this year, having clocked 9.78 in Lausanne in June.
The world championships will be held in Daegu, South Korea from Aug. 27 to Sept 4.
