UPDATE 3-Soccer-Bordeaux keep up pressure on Marseille

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* Bordeaux win 3-0 at home against Sochaux

* Bordeaux level on points with leaders Marseille

* Paris St Germain slump to home defeat by Stade Rennes

By Claude Canellas

BORDEAUX, France, May 3 (Reuters) - Girondins Bordeaux moved level on points with Ligue 1 leaders Olympique Marseille thanks to a 3-0 victory over struggling Sochaux on Sunday.

Early goals by 19-year-old Gregory Sertic and France playmaker Yoann Gourcuff and a stoppage-time header by Marouane Chamakh carried Bordeaux to 68 points with four games left.

Marseille top the table on goal difference after they drew 2-2 against Toulouse on Saturday.

"My team will fight until the end and if we keep that state of mind, we will be rewarded," Bordeaux coach Laurent Blanc told Canal Plus channel after his side extended their winning streak to seven league games.