Blaise Matuidi scored a minute from time to put Paris St Germain on the brink of the French title as they beat Evian 1-0.
Fresh from winning the Coupe de la Ligue on Saturday, Laurent Blanc's men looked tired and likely to fluff their lines against their relegation-haunted opponents.
But Matuidi took in a Lucas Moura pass close to the final whistle to do the deed and see off their 10-man opponents, with Kassim Abdallah having already seen red.
As a result PSG are now 10 points clear of second-placed Monaco with four games left and will confirm back-to-back titles with a win at Sochaux on Sunday.
Lyon were unable to move level with fourth-placed St Etienne in Ligue 1 as they were held to a goalless draw at Toulouse.
The hosts had the better chances, with Wissam Ben Yedder and Martin Braithwaite both denied by the woodwork in the second half and their more illustrious opponents held largely at arm's length.