(CNN) -- Jamaican sprinters Usain Bolt and Asafa Powell go head-to-head in a 100 meters warmup for the Beijing Olympics in Stockholm on Tuesday.

Bolt won his previous clash with Powell, in the Jamaican championships in June.
Bolt set a world record of 9.72sec in May, bettering Powell's previous mark of 9.74.
Powell pulled up with a groin strain in his last outing in Rome earlier this month while Bolt has run the fifth fastest 200m of all time this season.
Bolt and Powell last clashed at their national championships on June 28, with the world's fastest man winning in 9.85sec to 9.97sec.
After the race, Powell will travel to London to take on Tyson Gay on Friday.
The American, the world 100m and 200m champion, has also had injury problems but won the US Olympic trials final in Oregon in June in a wind-aided 9.68, the fastest time ever under any conditions.
Powell said: "I guess it is a lot better when the attention is not on me.
"I prefer it that way. I am a lot more comfortable now. I can relax and focus on my form and technique and just focus on running fast."
Bolt is hoping for the temperature to rise.
"It's cold for me, I definitely prefer to run in warmer weather," he said."I'm from tropical Jamaica. I hope the weather changes."
There will also be an intriguing first clash between pole vaulters Yelena Isinbayeva of Russia and American Jennifer Stuczynsk in Stockholm.
Isinbayeva set her 22nd world record when she easily cleared 5.03m in Rome, just after Stuczynsk won the USA Olympic trials with 4.92m.
"When Stuczynski jumped 4.90 then 4.92 it made me so angry because everyone started to say 'Isinbayeva is finished, we have a new star'.
" It made me angry and I am happy for that feeling because I didn't feel it enough since my last world record," said the Russian.
In the men's 110m hurdles world record holder Dayron Robles of Cuba, who failed to lower the record by just 100th of second in Paris on Friday, faces David Oliver for the first time since the American beat him in Berlin on June 1.

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