Paris Saint-Germain triumphed 2-1 on Saturday thanks to a late Randal Kolo Muani winner against Nantes, with Monaco winning to go second.
Bradley Barcola's stylish finish just before the break gave PSG the lead, but a Mostafa Mohamed header in the second half made it look as if the points would be shared in the capital.
However, Kolo Muani pounced in the six-yard box seven minutes from time to allow PSG to open up a six-point lead at the top of the table.