By Kasra Moradi Arsenal legend Robert Pires claims he sparked an infamous tunnel bust-up against Manchester United. Captains Roy Keane and Patrick Vieira butted heads in the tunnel before a high-stakes showdown at Highbury in February 2005. Having clashed several times in the past, Keane and Vieira on that occasion were seen shouting at each other down the narrow tunnel before going out onto the Highbury pitch for the Premier League meeting. Footage showed Vieira walking down towards the tunnel entrance as the Frenchman’s team-mates Dennis Bergkamp and Pascal Cygan tried to calm him down. Kean…