Bayern Munich star Franck Ribery appears in court after agent claims £3.1m in unpaid commission while Frenchman insists his signature had been forged on document.Franck Ribery made an appearance on court on Tuesday after his former agent claimed the Bayern Munich star owed him €3.5million (£3.1m).Bruno Heiderscheid claims he is owed the figure as commission from Ribery's £27m transfer from Marseille to Bayern in 2007. Ribery is contesting the claim.The agent claims there was a verbal agreement made, and later a physical document, which was shown to the court. But Ribery insists that his signature on the document had been forged.