Robert Heffernan embarks on the first leg of an Olympic double today when he lines up for the men’s 20k walk before embarking on a new Olympic experience in the 50k walk next Saturday.

An injury to Olympic 400m champion LaShawn Merritt was the big talking point of the Diamond League meeting in Monaco last night.

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.