All eyes are on Daegu Pre-Championships Meeting where Usain Bolt will make his 100m season's debut on Wednesday.

The Jamaican triple Olympic and triple world champion should be able to erase American Ivory Williams' 9.95 seconds world leading time off the books, but the question is how fast he can go in the first race at this IAAF World Challenge Meeting.

Upon his arrival at Daegu, South Korea on Saturday, Bolt said his appearance at this World Challenge meeting would provide a nice opportunity to get a feel for the track which will host next year's IAAF World Championships. Bolt promised to "run hard as always" and promised "a fast time".

But Bolt might face the hurdle of bad weather. The forecast for Wednesday in Daegu is heavy rain although temperature looks to be nice at 30 C.

Bolt's compatriot Asafa Powell, the former world record holder (four times) already started impressively with a win in the Doha Diamond League. With both race being slightly wind aided Powell clocked 9.75 in the heats, equal second best result during rounds in all conditions and 9.81 in the final. Powell is not going to compete in Daegu, but there is still a need for a statement by Bolt following his strong start to the sprint season.

Bolt has already competed a few times this season in several relays and once in both 200m and 400m. A 45.87 season's best in the 400m was his first individual race of the season in mid-February, but his 19.56 world leading time in 200m into a headwind in Kingston on May 1 was a clear sign of what might come later.

Despite the absence of Powell, Bolt still has some competition in Daegu. Three other sub 10-second runners will be starting in the stadium which will host next year's World Championships. They are 23-year-old American Travis Padgett, another Jamaican Michael Frater and 60m World Indoor Championships silver medallist Mike Rodgers of the United States.