Ahead of Sunday's 150m race in Deansgate at the Great City Games in Manchester, American sprinter Tyson Gay says a 2011 showdown with Usain Bolt will only happen if both men are fully fit.
Great Day of Sport: Manchester, Sunday 15 May. Coverage: Live on BBC Two and BBC Sport website:
Great Manchester Run 1000 BST
Great Salford Swim 1400 BST
Great City Games 1530 BST