World No.2 Rory McIlroy to play third - ranked Lee Westwood in World Match ##play off . The winner will depose Luke Donald at the top of the world rankings if they can also win the title . The U.S. will have a shot at the title for the first time since Tiger Woods won it in 2008 . Ideally they would be meeting in Sunday 's 18-hole final in a showdown to see who will depose Luke Donald as golf 's top dog , but instead they will have to clash in the semi . Former Ryder Cup player Bradley Mahan will play Australian Mark Wilson in the other semifinal in Arizona .
World No.2 Rory McIlroy to play third - ranked Lee Westwood in World Match ##play off . The winner will depose Luke Donald at the top of the world rankings if they can also win the title . The U.S. will have a shot at the title for the first time since Tiger Woods won it in 2008 . Former Ryder Cup player Bradley Mahan will play Australian Mark Wilson in the other semifinal in Arizona .