Paris Saint-Germain bounced back from their shock elimination in the League Cup by thrashing 10-man Amiens 3-0 in Ligue 1 on Saturday.
PSG, who lost 2-1 to En Avant Guingamp in the League Cup quarterfinals on Wednesday, struggled in the first half as they were without Neymar, rested by coach Thomas Tuchel.
But the French champions stepped up a gear after the break to claim a no-nonsense win that lifted them to 50 points from 18 games, 13 ahead of second-placed Lille who have played two more games.
PSG doubled the tally after Khaled Adenon was sent off following his second yellow card in the 66th minute.
In the 70th, striker Kylian Mbappe latched onto a cross from Cavani to give the visitors a two-goal cushion as he snatched his 14th goal of the season.
Centre-back Marquinhos rounded it off 11 minutes from time as PSG continue their march towards the title, leaving Amiens in 17th place with 18 points.