PARIS, Sept 21 (Reuters) - Olympique Marseille fell four points behind leaders Olympique Lyon when they could only manage a 0-0 home draw with Monaco in Ligue 1 on Sunday.
Marseille, beaten 2-1 by Liverpool in the Champions League midweek, held on to second place but lost ground the champions, 1-0 winners at promoted Le Havre on Saturday.
Lyon, chasing an eighth consecutive title, top the table on 16 points from six games, followed by Marseille on 12 points and Toulouse on 11.
Paris St Germain's promising start to the season suffered a setback when they lost 1-0 at St Etienne earlier on Sunday.
Defender Mouhamadou Dabo gave St Etienne the points with a superb drive from outside the box on 14 minutes to lift his side out of the danger zone and up to 16th in the 20-strong league.
PSG, who narrowly escaped relegation last season, slipped to seventh, six points off the pace.