PSG came into the contest on the back of three draws in all competitions and it showed in their early play with Gianluigi Donnarumma having to deny Amine Harit in the 23rd minute to keep his side in the contest.
Pau Lopez returned the favour just minutes later to deny Kylian Mbappe by tipping his shot over the bar. A returning Lionel Messi then went close to opening the scoring but his freekick rattled the crossbar before falling to safety.
There was no saving Marseille a third time as Neymar finally found the net for PSG before halftime, steering Mbappe’s low cross past Lopez.
The home side upped the ante after halftime but failed to find the second goal despite peppering the opposing goal with shots. There was more misery for the visitors as Samuel Gigot was sent off for a challenge on Neymar in the 72nd minute to complicate matters further.
PSG were happy to sit back for the rest of the game and look for a counter and it almost worked when Mbappe played Messi through but his chipped effort flew narrowly over the bar.
Despite the missed chances, the home side saw off the game to move to 29 points from 11 games, three ahead of second-placed Lorient.