A counter attack from yellow jersey Bradley Wiggins and Team Sky colleague Chris Froome saw the British cyclists move into first and second place overall after stage 11 of the Tour de France as the race entered the high Alps.
On a 148-kilometre route from Albertville to La Toussuire which Wiggins had described as the toughest day of the route to Paris, the 32-year-old Londoner survived repeated attempted attacks on his commanding lead as Pierre Rolland (Europcar) triumphed.
Wiggins was set to enter Friday's 226km 12th stage from Saint-Jean de Maurienne to Annonay-Davezieux with a 2:05 advantage over Froome, with Vincenzo Nibali (Liquigas-Cannondale) third, 2:23 behind, and Cadel Evans (BMC Racing) 3:19 adrift in fourth.
Van den Broeck (Lotto-Belisol) sits fifth, 4:48 behind.
Defending champion Evans made a short-lived attack two thirds of the way up the 22.4km Col de la Croix de Fer, the second of the day's two 'hors categorie' (beyond category) climbs.
The forlorn attempt was perhaps an indication of his form as Evans, who began the day one minute 53 seconds behind in second place, lost touch with Wiggins two thirds of the way up the final climb.
Nibali, fourth at the start of the day, twice attacked on the 18km final ascent to La Toussuire, but Froome and Wiggins shared the pursuit to close the gap.
As Rolland claimed a solo success, Thibaut Pinot (FDJ-Bigmat) won the dash for the line to claim second, 55 seconds behind, with Froome third on the same time. Jurgen van den Broeck was fourth, Nibali fifth and Wiggins sixth, two seconds further adrift.
Evans rolled in 2mins 23secs behind, conceding 1:28 to Froome, who moved up to second place in the rankings.