DUBAI (Reuters) - World number one Rory McIlroy and second-ranked Luke Donald gave the organisers and fans what they wanted when the pair set up a classic duel in the desert after the DP World Tour Championship third round on Saturday. The two Britons shot matching six-under-par 66s to sprint three strokes clear of their nearest rivals on 17-under 199 and will engage in a head-to-head showdown ...