PARIS, Aug 25 (Reuters) - Nancy took command of Ligue 1 with a 4-1 demolition of AJ Auxerre as Guy Roux's return to service ended after only four games with RC Lens on Saturday. Nancy have 13 points from five matches, two points ahead of Lorient, who snatched a last-gasp, 2-2 draw at Girondins Bordeaux. David Bellion netted a double for Bordeaux but the former Manchester United striker's efforts were twice cancelled by Rafik Saifi in the 15th and Hamed Namouchi one minute from time. Nancy were never bothered by 17th-placed Auxerre, scoring through Malonga Ntsayi, Kim, Frederic Biancalani and Marc-Antoine Fortune. Monaco, who came from behind to beat Le Mans 3-1, are third on 10 points. Daitsuke Matsui opened the scoring for the visitors but three goals in 17 minutes by Leandro Cufre, with a penalty, Jeremy Menez and Frederic Piquionne gave the principality team all three points. Four teams are on 10 points with Racing Strasbourg in fourth place following their 2-1 win over RC Lens as Roux officially resigned at half-time. Roux, who came out of retirement to take the reins of the northern side, quit after his team failed to win any of their four matches and scored only once. COACHING RECORD The 68-year-old Roux had signed a two-year contract with Lens two seasons after he retired from the game upon completing a record-breaking 45 years' service at Auxerre. Lens are second from bottom with two points from four games. 'When a player does not feel fit, it is his duty to tell his coach. When a coach feels the same, he must tell his president,' Roux told French radio. 'I could not hide that I did not have the kind of form that always enabled me throughout my career to get the best from the players. 'I told (club) president Gervais Martel to replace me with someone younger,' he added. Former France striker Jean-Pierre Papin, who was Strasbourg's coach last season, has been cited as a possible replacement for Roux. Valenciennes moved up to fifth after beating Sochaux 3-1 and are level on points with Le Mans, who led the standings with Lorient and Nancy before kick-off. Earlier on Saturday, Olympique Marseille tasted victory for the first time this season in Ligue 1 after goals by Julien Rodriguez and Mamadou Niang gave them a 2-1 win at promoted Caen. Albert Emon's side moved up to 10th with six points.