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Mathieu Valbuena played for Libourne Saint-Seurin in the third level of French football during the 2003-04 season. He scored 11 goals in 32 games as the club finished in fourth place in the Championnat National. Valbuena then moved to Marseille, where he went on to become a key player in the team's success in the Ligue 1 and the UEFA Champions League.