Usain Bolt is worried chilly weather in Stockholm could slow him in the rematch between the world's fastest men at the DN Galan track meet.

When he faces Asafa Powell in the 100 meters today, the temperature by race time is expected to dip to 57 degrees.

"It's cold for me, I definitely prefer to run in warmer weather," said Bolt, the world-record holder in the 100. "I'm from tropical Jamaica. I hope the weather changes."

A dozen sprinters in the field have personal bests under 10 seconds. Bolt set the world record of 9.72 seconds in New York on May 31, breaking Powell's mark of 9.74.