Angel Gomes fired Marseille ahead in the 25th minute with a free-kick that squirmed through the hands of Brest goalkeeper Radoslaw Majecki.

Greenwood struck his eighth league goal of the season from the penalty spot after Igor Paixao was fouled in the area by defender Kenny Lala.

Pierre-Emerick Aubameyang bagged a late third as Marseille shook off their midweek Champions League defeat by Atalanta to go a point clear of PSG.

Luis Enrique's injury-hit side can reclaim first place on Sunday with a win away to Lyon.