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LA TOUSSUIRE, FRANCE - JULY 24: Chris Froome of Great Britain riding for Team Sky in the overall race leader yellow jersey is followed by Nairo Quintana (3L) of Colombia riding for Movistar Team in the best young rider white jersey, Alberto Contador (2L) of Spain riding for Tinkoff-Saxo and Alejandro Valverde (L) of Spain riding for Movistar Team during stage 19 of the 2015 Tour de France from Saint-Jean-de-Maurienne to La Troussuire on July 24, 2015 in La Toussuire, France. (Photo by Doug Pensinger/Getty Images)

LA TOUSSUIRE, FRANCE - JULY 24:  Chris Froome of Great Britain riding for Team Sky in the overall race leader yellow jersey is followed by Nairo Quintana (3L) of Colombia riding for Movistar Team in the best young rider white jersey, Alberto Contador (2L) of Spain riding for Tinkoff-Saxo and Alejandro Valverde (L) of Spain riding for Movistar Team during stage 19 of the 2015 Tour de France from Saint-Jean-de-Maurienne to La Troussuire on July 24, 2015 in La Toussuire, France.  (Photo by Doug Pensinger/Getty Images)