San Francisco - World No 1 Rory McIlroy and Masters champion Jordan Spieth opened their WGC-Match Play Championship campaigns with easy wins Wednesday on a day of upsets at the new-look $9.25m event.
Northern Irish star McIlroy carded just one birdie and 13 pars but was too good for Jason Dufner, winning 5&4 at San Francisco's picturesque Harding Park course.