Mason Greenwood, a former Manchester United forward, scored inside three minutes and added another penalty on the half-hour after Marseille's Luis Henrique increased their advantage. Luis Henrique scored again after Mahdi Camara's crushing effort brought it back to 3-1 before halftime.

Greenwood got a second penalty after being brought down by Jordan Amavi, but Elye Wahi, another of Marseille's new arrivals, tucked it away to conclude a superb performance by Roberto De Zerbi's new-look team. Greenwood, 22, joined last month from Old Trafford, where he began his career in promising manner until being suspended in January 2022. He was one of five newcomers to the Marseille squad, following Argentine goalkeeper Geronimo Rulli, Canadian defender Derek Cornelius, Danish midfielder Pierre-Emile Hojbjerg, and Wahi, who was recruited from Lens on Tuesday. Brest's third-place result last season was the greatest rank in club history, but a number of key players have already gone, while others are unavailable due to injury or suspension, making it a troubling start for the Champions League newcomers.