Usain Bolt says he is not too tired after his Olympic exploits heading into Friday's Zurich Grand Prix."I've had some sleep since I've been here so I'm not tired," he said. "I'm trying to get my blood pumping again."
Yelena Isinbayeva, Dayron Robles and Kenenisa Bekele are among 12 Olympic champions who will compete in Zurich.
But Bolt, 22, will be centre stage after he claimed gold in the 100m, 200m, and 4x100m relay, recording world record times in each race.
The Jamaican's coach Glen Mills believes could have run closer to 9.5 seconds on his way to the Olympic 100m title, when he clocked a world record 9.69 secs despite celebrating before crossing the line.
"If he had continued running, the slowest he would have run would have been 9.52," said Mills.
"In two more years he should be peaking at this distance and by then I am certain he will be down to there."
