Ligue 1 leaders Paris St Germain head to Marseille this weekend for a le Classique that the home side need to win.
OM languish 10th in the standings after an indifferent start to the season, while their big-spending Parisian rivals lead the way in France.
Marseille won the pair's most recent encounter back in March and midfielder Stephane Mbia wants a similar result on Sunday.
''We need to turn our attention and focus on our next match [after losing against Olympiacos in the Champions League],'' he told OMTV. ''Defeat to Paris in the Clasico on our own turf is unthinkable. If you take a good look at the statistics, you'll see that Marseille wins more often than other clubs after a European fixture.''
Marseille boss Didier Deschamps echoed the Cameroon international's sentiments, adding: ''It's been a bad week so far [two defeats in five days], but we have another match to play on Sunday. For the moment, I don't want to talk about what's waiting for us.
''I'm horrified by the idea of a loss. We need to process the [defeat to Olympiacos] and only then can we turn our thoughts to Sunday night.''
While PSG are braced for a long trip south, fellow high-fliers Montpellier - they trail PSG on goal difference only - face a tough away trip of their own to Sochaux.
Third-placed Lille host Brest in Saturday's late kick-off, which comes after fourth-place Rennes take on Evian and Toulouse play Valenciennes.
Relegation-threatened duo Nancy and Dijon will go head-to-head on Saturday, while St Etienne play rock-bottom AC Ajaccio and Caen travel to Bordeaux.
Before le Classique on Sunday evening, Lyon travel to Auxerre looking for three points and Lorient welcome Nice to Stade du Moustoir.