Michael Johnson has claimed that Usain Bolt is unrivalled in the world of sprinting after he claimed a 10th World Championships gold in Beijing this afternoon.

Having already seen off Justin Gatlin by the narrowest of margins in the 100m final on Sunday, Bolt clinched a fourth consecutive world 200m crown by again beating Gatlin in the final.

This year's event was seen as one of the biggest tests of Bolt's dominance so far, but Johnson believes that the Jamaican is still in a league of his own.

"What surprised me is the bend Usain Bolt ran. Gatlin tightened up trying to keep up with Bolt. I expected Gatlin to be ahead of Bolt on the bend and then Bolt would catch him, but Bolt surprised us in terms of the time," he told BBC Sport.

"He is the best in the world and he does not have any rivals. We have to give him a lot of credit for running in the 100m and 200m - this is the most he has been challenged.

"He won the 100m, then there were questions of whether he would run in the 200m but he came and ran in a world-leading time. We haven't seen this type of showdown since Bolt came into prominence in 2008."

Bolt will look to make it a trio of golds in Beijing when he takes part in the 4x100m relay later this week.