FINHAUT-EMOSSON, SWITZERLAND - JULY 20: Chris Froome of Great Britain and Team Sky finishes behind Richie Porte of Australia and BMC Racing Team during stage 17 between Bern and Finhaut-Emosson (184,5km) on July 20, 2016 in Finhaut-Emosson, Switzerland. (Photo by Jean Catuffe/Getty Images)

FINHAUT-EMOSSON, SWITZERLAND - JULY 20: Chris Froome of Great Britain and Team Sky finishes behind Richie Porte of Australia and BMC Racing Team during stage 17 between Bern and Finhaut-Emosson (184,5km) on July 20, 2016 in Finhaut-Emosson, Switzerland. (Photo by Jean Catuffe/Getty Images)