WALK around the market in central Marrakech and, as well as traditional items such as leatherware, hand-beaten metal objects and various exotica, you will find stalls devoted to football shirts, with Manchester United, Barcelona, Real Madrid and Bayern Munich, among others, fighting for customer attention. If you venture into the back streets, you will undoubtedly come across a young boy on a scooter, weaving through the dark, scented passages, wearing an AC Milan or Liverpool tracksuit. In cities with a long and deep cultural history, evidence of the power of the global football brand is easily discovered. The world’s leading clubs, all European, are building global franchises. It began some years ago with overseas tours that were a combination of diplomatic mission, money-making fixtures…