Nibali leaves rivals to fight for scraps

Nibali (Astana) added victory on the 145.5-kilometre 18th stage from Pau to Hautacam to wins in Sheffield, La Planche des Belles Filles and Chamrousse.
The Italian — the first yellow jersey holder since Eddy Merckx in 1974 to win four stages outside of time trials — began the day with an advantage of five minutes 26 seconds and enhanced his lead to a near-unassailable 7mins 10secs with just three stages to go.