Andy Schleck, Alberto Contador, Lance Armstrong, Tour de France 2009, stage 20

Alberto Contador is suffering from hay fever, Mark Cavendish had a brief encounter with the ‘flu and Lance Armstrong has still got form problems after a stomach bug - but they're far from being the only Tour de France stars going through a difficult patch.

Sky's Bradley Wiggins failed to make it to the start of the Tour of Catalonia because of gastroenteritis and has been forced to rethink his April schedule as a result.

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