Phil Mickelson continues swift progress at WGC-Dell Technologies match play

Five-time major winner Phil Mickelson continued to look like a man in a hurry as he cruised into the quarter-finals of the WGC-Dell Technologies Match Play.

Mickelson, who is seeking a first title since winning the 2013 Open at Muirfield, defeated Australia's Marc Leishman 4&3 in their last-16 clash at Austin Country Club on Saturday.

And that means the 46-year-old has yet to be extended beyond the 15th hole so far this week after similarly impressive victories in the group stages of the £7.8million event.

Mickelson, who thrashed Ryder Cup team-mate JB Holmes 6&5 after beating Si Woo Kim 5&3 and Daniel Berger 5&4 to win group 14, was five up after 10 holes against Leishman, who survived a three-man play-off to emerge from his group.

A birdie on the 11th and a par on the 12th saw Arnold Palmer Invitational winner Leishman reduce his deficit to three holes, but the 33-year-old made a mess of the 15th and - with Mickelson in close - conceded the hole and the match.

"I'm certainly a little bit worried, because I know there's going to be a key match that's going to go down to the last few holes," Mickelson told PGA Tour Live. "And I'm not as comfortable on those holes as I'd like to be.

"But I love the fact that I'm able to be rested and ready to play, because I think it's helping me get off to a good start."

Mickelson will face Bill Haas in the quarter-finals after Haas beat fellow American Kevin Na on the 18th.

Spain's Jon Rahm, who has not trailed at any point in his four matches so far, was the first man into the last eight after thrashing American Charles Howell III 6&4.

And Rahm will face Denmark's Soren Kjeldsen for a place in the semi-finals after Kjeldsen, who beat Rory McIlroy in his first group match on Wednesday, defeated William McGirt 5&4.