ASAFA POWELL laid down a challenge to his 100m rivals byclocking a wind-aided 9.75 seconds as the IAAF Diamond League got underway in Doha last night.

AMERICA’S Allyson Felix last night cruised to her third straight 200 metres title in the World Championships in Berlin, but compatriot Jeremy Wariner failed to secure his own hat-trick.

Kenya-born Bernard Lagat won a fifth World Championship gold medal for Team USA in Osaka and then proclaimed: “I feel very special.”