Tour leader Thomas Voeckler adjusts his chinstrap as he prepares for another day in the Pyrenees

The peloton gears itself up for two category one climbs before embarking on the final Hors category climb

France's Sylvain Chavanel leads Denmark's Mickael Rasmussen (left) and Germany's Jens Voigt as the trio break away

Lance Armstrong rides alongside Richard Virenque as the pack slowly reels in the leading riders

But Voeckler finds the going hard on the early climbs and looks likely to lose his hold on the yellow jersey

America's Tyler Hamilton withdraws from the Tour midway through the stage with a back injury

But Armstrong and Ivan Basso fight it out on the final climb to Plateau de Beille in a repeat of Friday's finish

And the American comes out on top this time to strengthen his chances of winning a sixth consecutive Tour

However, Voeckler retains his overall lead after overcoming his earlier problems with a courageous climb to the finish