Then, in a bid to have a fresh start, Chambers looked to a career in American Football playing for the Hamburg Sea Devils in the NFL Europa League, before returning to the track in 2008.

CNN: Disgraced Chambers has Bolt in his sights

If he makes it through that he will join a six-week camp in Florida which could see him allocated to one of six teams - Amsterdam Admirals, Berlin Thunder, Cologne Centurions, Frankfurt Galaxy, Hamburg Sea Devils or Rhein Fire.

BBC: SPORT | Athletics | Chambers is given track lifeline