Rory McIlroy into match play quarter-finals as Jordan Spieth tumbles out

Defending champion Rory McIlroy remained on course to retain his WGC-Dell Match Play title as world number one Jordan Spieth crashed out in front of his home fans in Texas.

McIlroy edged past Open champion Zach Johnson on the 18th to set up a quarter-final with American Chris Kirk, but Spieth lost 4&2 in the last 16 to South Africa's Louis Oosthuizen at Austin Country Club.