Chris Froome stormed into the lead of the Giro d'Italia with a stunning solo ride as Simon Yates' hopes of glory were demolished on the biggest mountain of the race.
Team Sky's Froome attacked with 80 kilometres of the demanding 181km stage from Venaria Reale to Bardonecchia left and won the stage by two minutes and 59 seconds from Movistar's Richard Carapaz.
The Briton takes the race leader's pink jersey as defending champion Tom Dumoulin came home fifth, three minutes and 23 seconds down.
Page 2: 16:24 Froome, who began the day fourth in the general classification, three minutes and 22 seconds off pink, now leads by 40 seconds from Dumoulin.
Yates, who began the day with an advantage of 28 seconds over defending champion Dumoulin, had cracked on the Colle delle Finestre, finally crossing its gravel-road summit more than 15 minutes after Froome.