"I just wanted to give the spectators a treat," said the reigning 100m world champion and Tokyo Olympics silver medalist, leading out of the turn and slowing down and raising his arm in l air when he heard the race was won.

"I still have to work on the corner, but I'm not too worried about it," added the 27-year-old sprinter.

Kerley, whose personal best is 19.76 on the half lap, is one of only three men in history to run under 10 seconds in 100m, under 20 seconds in 200 m and in less than 44 seconds over 400 m, with his compatriot Michael Norman and the South African Wayde van Niekerk.

The 27-year-old sprinter stressed during the week that he wanted to focus more on the 200m after missing out on a medal in that distance at last year's World Championships in Eugene, Oregon.

© 2023 AFP