So far this season Rennes has had good results when Rennes is playing at home and in fact, Rennes is better than Marseille for the home match record this season. But even so, the reality is that Marseille is the team that is in the top position based on the record of away matches so far this season, so this match is of course a good chance for Marseille to still get points.
Whatever the result can happen, because both of these teams have good abilities for home and away matches. But yes, because at this moment Marseille is in second place in the Ligue 1 standings so I will still be confident to have Marseille win.