Cesc Fabregas made his Monaco debut as Thierry Henry’s side held Marseille to a draw at the Stade Velodrome.
Fabregas, who joined the Ligue 1 club from Chelsea last week, was powerless to prevent Maxime Lopez from firing Marseille ahead after 13 minutes.
Youri Tielemans equalised for the visitors with a well-taken goal seven minutes before the break.
Florian Thauvin had a goal ruled out by VAR in the second half as Monaco held on for a share of the spoils.
Monaco remain four points off safety, although they do have a game in hand on 17th-placed Amiens, who were beaten 3-0 by Paris St-Germain on Saturday.
Marseille, who started the weekend in sixth, slip three places to ninth after victories for Nice, Rennes and Strasbourg