 Many Arsenal fans were disgruntled, as they believed Rooney had dived and the penalty should not have been given.In the tunnel after the match tempers boiled over between staff of both clubs, and amid the brawl a slice of pizza was thrown at Manchester United manager Sir Alex Ferguson, allegedly by Arsenal midfielder Cesc Fàbregas.Arsenal manager Arsène Wenger was furious in his post-match briefing, criticising Riley for his performance and describing Van Nistelrooy as a cheat.