Gary Imlach and Chris Boardman present highlights of stage 20. A year ago, on the final, decisive mountain stage of the Tour de France, Chris Froome nearly surrendered his lead in the face of aggressive, swashbuckling riding from Nairo Quintana. Today's 146km stage represents the final opportunity to revise the podium of this year's Tour. Four gargantuan and stunningly scenic climbs provide the most evident opportunity, but there is also a tricky final descent to Morzine as the setting for a possible, last-gasp coup. Either way, on the finish line today we will know this year's champion. Commentary by Ned Boulting and David Millar with Daniel Friebe reporting from the roadside.