Frenchman Warren Barguil delivered a Bastille Day victory on stage 13 of the Tour de France as Fabio Aru retained the yellow jersey, and Dan Martin went to the well once again to earn another top-10 finish.
Quickstep rider Martin slipped to sixth in the General Classification after his sixth-placed finish into Foix. He's one minute and 32 seconds behind Aru.
Barguil won from Nairo Quintana, Alberto Contador and Mikel Landa as the breakaway held out on the 101 kilometre stage from Saint-Girons.
Chris Froome crossed the line just ahead of Aru in eighth place but could do nothing to cut into the Italian's slim six-second advantage at the top of the GC.
The top four in the fight for yellow - who started the day separated by just 35 seconds - were all in the same group at the finish, which means that Romain Bardet remains third, 25 seconds back with Colombian Rigoberto Uran in fourth.
But Team Sky did make a major impression on the day as Landa's place in the break saw him claw back one minute and 48 seconds on the general classification, moving him up to fifth, 69 seconds back.
Although they could not regain the yellow jersey Froome lost on Thursday, they put considerable pressure on Aru's Astana team, which suffered another loss midway through the stage when Criterium du Dauphine winner Jakob Fuglsang abandoned, having ridden for the best part of two days with fractures in his elbow and hand following a stage 11 crash.
Landa and Contador had attacked on the second of the day's three category one climbs, the Col d'Agnes, and quickly built a lead which looked likely to hold to the end.
They were joined by a counter-attack from Quintana and Barguil on the final climb, the punishing Mur de Peguere, and the front four crossed the summit with a lead of two minutes and two seconds.
Cette fois-ci, il n'y a pas photo, @WarrenBarguil imbattable sur ce sprint ! / No photo finish today, Barguil was the strongest! #TDF2017 pic.twitter.com/x59rh3ETsA
— Le Tour de France (@LeTour) July 14, 2017
While they were left to contest stage honours up ahead, the group of contenders began a lengthy game of cat and mouse.
Froome tried an attack in the final metres of the Peguere but was quickly shut down, while the long descent saw a series of attacks and counter-attacks.
With the top four watching each other closely, Martin slipped away and was soon followed by Simon Yates in the young riders' white jersey, and the pair picked up nine seconds by the finish line.
That leaves Martin in sixth overall, while Yates sits seventh, two minutes and four seconds down but with a gap of more than two-and-a-half minutes over his rival for white, South African Louis Meintjes.
