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PEYRAGUDES, FRANCE - JULY 13:  Christopher Froome of Great Britain riding for Team Sky in the yellow leader's jersey crosses the finish line during stage 12 of the 2017 Le Tour de France, a 214.5km stage from Pau to Peyragudes on July 13, 2017 in Peyragudes, France.  (Photo by Chris Graythen/Getty Images)
PEYRAGUDES, FRANCE - JULY 13:  Christopher Froome of Great Britain riding for Team Sky in the yellow leader's jersey crosses the finish line during stage 12 of the 2017 Le Tour de France, a 214.5km stage from Pau to Peyragudes on July 13, 2017 in Peyragudes, France.  (Photo by Chris Graythen/Getty Images)

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Tour de France champion fails drug test

Four-time Tour de France champion Chris Froome failed a drug test during his Vuelta a España win in September. CNN's Amanda Davies reports.

Tour de France champion fails drug test

Four-time Tour de France champion Chris Froome failed a drug test during his Vuelta a España win in September. CNN's Amanda Davies reports.