DUBAI, United Arab Emirates - Rory McIlroy got the better of a battling Andy Sullivan over the back nine of the DP World Tour Championship Sunday to win the European Tour's season-ending tournament as well as the Race to Dubai.

The third-ranked Northern Irishman shot 6-under-par 66 to finish with a 21 under 267, one ahead of Sullivan (68).

England's Danny Willett, who started the tournament mere 1,613 points behind McIlroy in the Race to Dubai and needing to beat him to become the European No. 1 for the first time in his career, finished tied for fourth on 13 under (275).

South Africa's Branden Grace shot a 5 under 67 in the final round to finish third on 273.