Sam Horsfield eased into the semi-finals of the ISPS HANDA World Super 6 Perth with a thumping 3 and 2 victory over amateur Min Woo Lee.
The Englishman came through all three stages to win the Qualifying School in November but missed three of his first four cuts in 2018 as he found his feet on the European Tour.
He has looked like a veteran performer this week at Lake Karrinyup Country Club, finishing in the top eight after the stroke play to earn a bye into round two of the match play where he beat Matthew Millar after four trips up the shootout hole.
The players are facing off against each other over the tenth, 11th, 13th, 14th, 12th and 18th, with the 90-yard shootout hole used to separate those still all square.
Lee had not needed the shootout hole in rounds one and two as he made ten birdies in 11 holes to beat Satoshi Kodaira and Prom Meesawat but Horsfield had too much for him in the last eight.
The 21 year old will next face Australian James Nitties, a one up winner over countryman Callan O'Reilly.
Thai Kiradech Aphibarnrat beat Sean Crocker one up to also make it to the semi-finals and he will take on Lucas Herbert who beat fellow Australian Brad Kennedy on the second extra hole.
Horsfield went a long way left into the trees off the first tee but recovered to hole a 12-footer for par and a half before taking the next three holes.
A birdie handed him the second while Australian Lee bogeyed the third, and when the 19 year old went from one bunker to the other around the fourth green, he conceded the hole and the match as Horsfield got up and down for a birdie.
A Nitties bogey handed O'Reilly the first but the favour was returned on the second as the duo made a scrappy start.
Both players went par-birdie on the third and fourth and Nitties made a long putt on the fifth to match O'Reilly's gain, with another lengthy effort on the sixth handing him a par and the win.
Aphibarnrat needed a brilliant up-and-down to make Saturday's nine-man play-off and was the last man into the knockout after another four trips up the last.
He needed five trips up the shootout hole to beat Yusaku Miyazato in the last 16 and was involved in another tight contest against Crocker.
The three-time European Tour winner put his approach to tap-in range to win the first and was then handed a reprieve as Crocker missed a short putt on the third.
The American then hit a stunning tee-shot to eight feet on the par four fourth to make a birdie and get things back to all square.
Aphibarnrat almost chipped in for birdie on the sixth, leaving Crocker needing to get up and down from a bunker, and he could not manage it.
Herbert birdied the first but Kennedy made a gain on the third to send the duo to the shootout hole.
Both men parred it at the first attempt but after Kennedy found sand off the tee, Herbert made a 12-footer for birdie to bring a fist-pumping celebration.
