Rory McIlroy to begin Match Play title defence against Thorbjorn Olesen

Defending champion Rory McIlroy will face Denmark's Thorbjorn Olesen and American pair Kevin Na and Smylie Kaufman at this week's WGC-Dell Match Play.

And world number one Jordan Spieth was placed in an eye-catching group with 2014 runner-up Victor Dubuisson, Europe's Ryder Cup hero Jamie Donaldson and breakthrough star Justin Thomas for the tournament in Austin, Texas.