Bolt has world record in his sights

Usain Bolt will step up his preparations for next month's world championships tonight in Paris with his own 100 metres world record in his sights.

"I definitely think the world record can go any time," the Jamaican said ahead of the Golden League meeting. "Any time the weather is good, you never know."

Bolt, who set the record of 9.69sec in last year's Olympics in Beijing ,runs in a field that includes Britain's in-form Simeon Williamson and the 2003 world champion Kim Collins.