Jason Day celebrates return to top of world rankings with win

Jason Day marked his return to the top of the world rankings in emphatic fashion with a second WGC-Dell Match Play title in three years as Rory McIlroy turned his attention to completing a career grand slam.

Day, who replaces Jordan Spieth as world number one on Monday by virtue of his performance at Austin Country Club, beat defending champion McIlroy by one hole in a hard-fought semi-final on Sunday.