Last season's runners-up lost key figures James Rodriguez and Radamel Falcao in the transfer window and have picked up just four points from their first five matches in Ligue 1.
However, Leonardo Jardim's side followed up last week's 2-1 loss at Lyon with a confidence-boosting 1-0 triumph over Bayer Leverkusen at Stade Louis II and will be keen to build on that success.
Joao Moutinho scored the only goal of the group-stage opener and Jardim said: "It was important to get the win for a number of reasons, the main one being that the players needed the confidence boost.
"It also shows that the work we have been doing has paid off and that the players are making progress. Moreover, the lads came out on top physically in the second half. Our conditioning is at peak level right now.
"Joao Moutinho also lifted his game in the second half; we dominated possession and our opponents' intensity diminished."
Bordeaux can go top, for the time being at least, when they kick off the sixth round of fixtures on Friday night by hosting bottom club Evian, who are the only Ligue 1 team yet to win a match this season.
Marcelo Bielsa's Marseille will be seeking a fourth straight win when entertaining Rennes on Saturday, while Bastia visit Metz, Nice travel to Nantes and Toulouse host Caen.
In Sunday's remaining fixture, Lens will bid to extend their unbeaten run to four matches when Saint-Etienne visit Stade Felix-Bollaert.
