Usain Bolt and Justin Gatlin are among more than 600 athletes who have converged on Nassau, in The Bahamas, for this weekend’s second running of the International Association of Athletics Federation’s (IAAF) World Relays. And if the Jamaican world 100 and 200m record holder ends up running head-to-head with the man who has served two doping bans, it will, he says, not be an issue.

The athletics world is limbering up for an event which brought a new dimension to the sport last year, and which promises to create another colourful splash of entertainment and excitement over the weekend.

We are talking, clearly, about the World Relays, the format which so amply rewarded the International Association of Athletics Federations for creating it as a main season-opener to their calendar last year.

Bobsleigh and skeleton have officially become one organisation in Britain in a move designed to improve efficiency and - ultimately - performances at future Winter Olympics and World Championships.

Meb Keflezighi is far from certain about being able to defend his Boston Marathon title tomorrow, but the Eritrean-born United States runner is definite about the benefits of the city hosting the Olympics and Paralympics in 2024.