Triple Olympic champion Usain Bolt is on the road to recovery from a sore Achilles that kept him off the track for two weeks, the Jamaican said on Saturday.
An old back problem is keeping world 100 metres silver medallist Tyson Gay off the track when he should be training and racing, the American said on Thursday.
Usain Bolt's lack of form combined with his late withdrawal from the Jamaican 100 metres national trials on Thursday have raised more doubts about the future of the world's fastest man.