Paris: Usain Bolt set two new world records and harvested three gold medals in his last outing at the world championships, but the Jamaican has insisted that a further improvement in times for the 100 and 200m at Daegu is unlikely.
After storming to the sprint double in then-world record times at the Beijing Games in 2008, Bolt bettered that performance with a 9.58 and 19.19sec in the two events in Berlin a year later.
But an injury lay-off has put paid to any thoughts he harboured of going even faster in the August 27-September 4 worlds in South Korea, the 24-year-old at pains to remind fans he is "only human" and that constant expectations of quicker times are unrealistic.
"I`m not worried about either the 100m or the 200m, my best event," said Bolt, after coming within centimetres of suffering only the third defeat of his professional career in the Monaco Diamond League meet.
"It`s always key to keep winning. I`m never going to get to 9.58sec this season, I`m not at the same level as two years ago. I`ll try to get a 9.7sec or maybe 9.6."
The Jamaican made it clear that the Daegu worlds were one small step on the way to the 2012 Olympic Games in London, where, like the worlds, he will attempt to repeat his triple gold medal showing from the Beijing Games.
"I`m working my way up to the Olympic season, to being fit and ready then. London is the key," Bolt said.
"There are some little things to work on. I have time before the world championships and I will continue to do my best."