Sky attack targets Nibali

Team Sky leader Richie Porte said it is now up to him and his teammates to attack Tour de France yellow jersey holder Vincenzo Nibali.

Porte sits second overall at 2 min, 23 sec from the Italian after a couple of strong rides in the two uphill finishes so far.

Since reigning champion Chris Froome crashed out of the Tour with a broken wrist and hand in stage five, Australian Porte has stepped up to the leadership role of British team Sky.