PARIS, Aug 18 (Reuters) - A Marama Vahirua double handed Lorient a 2-1 win over six-times champions Olympique Lyon on Saturday and elevated them to the top of the Ligue 1 standings. Striker Vahirua, who had netted twice in his side's 3-1 victory at Paris St Germain earlier in the week, opened the scoring after 14 minutes with a perfect volley. Lyon, who have now lost their last two league games following last weekend's 1-0 defeat at Toulouse, hit back through France striker Karim Benzema, who lobbed Fabien Audard on 32 minutes. However, Vahirua struck the winner 20 minutes into the second half from a Nicolas Marin cross. Lorient are now level with Le Mans with 10 points from four games after Rudi Garcia's team were held to a 1-1 home draw against Lille. Nicolas Fauvergue put the visitors ahead on 34 minutes only for Grafite to draw level with a superb heel kick. Lyon, who have a game in hand, are 11th with three points. Earlier on Saturday, Czech striker Jan Koller netted twice to guide Monaco to a 3-0 win at Sochaux. The team from the principality climbed to fourth place with seven points from four matches. Sochaux, yet to win this season, are five points behind in 18th. Koller headed home in the second minute before former Sochaux midfielder Jeremy Menez made it 2-0 after 58 minutes following a fine slalom run through the defence. The third goal arrived a minute from time when Koller nodded in a cross by Juan Pablo Pino. Promoted Racing Strasbourg were fifth following a 3-1 victory at Toulouse while Paris St Germain failed to clinch their first win of the season when they drew 0-0 at Metz. St Etienne endured a 0-0 stalemate with Girondins Bordeaux while Toifilou Maoulida gave AJ Auxerre their first victory this season in a 1-0 win over promoted Caen. On Sunday, Olympique Marseille will also be out for their first win of the season when they host Nancy, who have a perfect record after three games.