PARIS. Monaco may have emerged as Paris Saint-Germains main rivals in the Ligue 1 title race this season, but the biggest game for the reigning champions is still against their bitter old foes Marseille. The clubs meet at the Stade Velodrome on Sunday night in the fixture that the French have come to call the Classique. The mega-rich title-holders from the capital will be guaranteed their usual warm welcome in the Mediterranean port city, home to arguably the most passionate fans anywhere in France. As it stands PSG trail Ligue 1 leaders Monaco on goal difference while Marseille are a point further back in third. There is plenty of incentive, then, for Elie Baups side to continue their impressive record at home to PSG down the years. OM have lost just one of their last nine home meetings with the club from the capital, with that 4-2 reverse coming in October 2008.