Sport, like life, is in constant need of regeneration. New talent, fresh personalities and role models are regularly required to augment and replace the established order.

There will be plenty of both, newcomers and champions alike, appearing at the IAAF Super Grand Prix meeting in Sheffield tomorrow. Among the neophytes will be Tyson Gay, the latest US sprinting sensation, who will be joining Olympic gold medallists such as Carolina Klüft, Liu Xiang, Kenenisa Bekele and Jeremy Wariner, as well as British stars, Becky Lyne and Marlon Devonish.