Marseille coach Elie Baup insists his side are not about to feel sorry for themselves as they look to avoid a sixth straight defeat in all competitions.
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Reims recorded a surprise 3-2 win at Stade Velodrome last weekend, but Baup believes he has seen enough within his squad to remain positive a turnaround in fortunes is not far away.
"Everyone is trying to be the best they can be, as much of a perfectionist as they can be. There is a desire to go into the details, to encourage each other. That is a good sign for me," Baup said at a press conference.
"What we showed in the second half against Reims, and what we have done this week, the players aren't accepting the situation in which we are in, this bad run.
"They want to do well. We will have to see what that brings."
Despite their poor run of form - which saw three straight Ligue 1 defeats in October and two losses in the Champion League - Baup retains the full support of the Marseille boardroom in his bid to get the side back into contention for the top four.
Marseille sporting director Jose Anigo said: "I tell you openly, along with the president, we are supporting him.
"You can't put Elie in the firing line, because the team has responded to what he wanted.
"In terms of our play, if we continue like this, we are going to turn our bad luck around."
Marseille will be without forward Andre Ayew, who starts a two-game ban this week.
Rennes, meanwhile, head into the match on the back of their midweek Coupe de la Ligue extra time win over Nancy.
Coach Philippe Montanier, whose side thumped Toulouse 5-0 in their previous Ligue 1 fixture, will not take the challenge of Marseille lightly.
"It is certain that they will be hungry. They are perhaps going to put on their best display at our place," he said.
"So it is up to us to up our game, because we can't count on our opponents' weaknesses.
"Marseille are still one of the best teams in Ligue 1. They never should have lost their last two matches."