(CNN) -- Rory McIlroy continued his dream American debut when he booked a place in the quarterfinals of the WGC-Accenture Match Play Championship in Arizona.
Northern Irish teenager McIlroy is proving to be one of the star attractions in Arizona this week.
The Northern Ireland teenager, in his first start as a professional in the United States, made it three wins in as many days as he reached the last eight with a 4&3 victory over Tim Clark of South Africa.
Clark cut short Tiger Woods' comeback from an eight-month injury lay-off with a 4&2 victory over the world number one at the Ritz-Carlton Golf Club on Thursday -- but that victory clearly took its toll and McIlroy capitalized to the full.
The 19-year-old jumped into a lead at the opening hole as Clark bogeyed the par-four first and he stretched his lead with a birdie four at the second to go two up.
McIlroy quickly established a stranglehold by going four up after six holes before Clark won his first hole at the seventh. The Dubai Desert Classic winner hit straight back with a birdie at the eighth to regain his four-up lead and maintained it to claim victory at the 15th.
He now plays Australian Geoff Ogilvy who beat Camilo Villegas 2&1 in a later match.
Meanwhile, England's Ross Fisher booked his place with a 4&3 victory over American Jim Furyk.
A day after crushing Pat Perez 6&5 in the second round, Fisher -- one of five Englishmen in the last 16 -- went one up at the par-three third, which he parred but Furyk bogeyed, and then birdied the par-four fourth to take a two-up lead.
He was three up at the turn before Furyk rallied by winning the 11th hole when Fisher found a bunker. The European Tour player restored his three-up lead at the 12th, however, when he holed a 52-foot putt.
The match was turning into a see-saw affair, with Furyk winning the 13th, but Fisher moved up another gear and won two holes in a row to seal victory at the 15th.
Paul Casey became the second Englishman through to the last eight with a 4&2 victory over Sweden's Peter Hanson and now plays American Sean O'Hair, who beat his compatriot Ian Poulter 2&1.
However, there was a setback for anotehr Englishman Luke Donald, who conceded his match with Ernie Els on the 18th fairway after complaining of weakness in his left wrist -- the same joint that required surgery last year and caused him to miss the latter half of last season.
The concession came with Donald still in with a chance of taking his match to extra holes, trailing one down at the last, but Donald called it quits in order to prevent further damage, handing the South African victory.
Els now plays Stewart Cink, a one up winner over Phil Mickelson.