Ernie Els reached the final four of the WGC Match Play Championship for just the second time with a 4 and 2 win over Jordan Spieth.
The South African veteran had won his previous three matches 1-up but had a relatively comfortable victory on Saturday at Dove Mountain, beating Spieth with two holes to play in the final of the Gary Player bracket.
The win took Els to the final four of the match-play event for the first time since 2001.
Els won three holes on the front nine but Spieth stayed with the 44-year-old South African with wins on the fifth and seventh.
On the back nine, Els' consistent putting was too much for Spieth with the 20-year-old American bogeying the 12th, 14th and 16th holes to hand his opponent victory.
Saturday's round was Els' best performance of the event sanctioned by both the PGA and European Tours and the four-time major winner will be looking to improve on his career-best finish of fourth from 2001.
"It's going to be the first time I've had an early time all week, so hopefully I'll make it (the final)," Els said.
"I'm just fortunate to be here and hopefully it goes good tomorrow. I still feel I've got a really good one in me."
Els will face Victor Dubuisson of France in the semi-finals after the seventh seed defeated Graeme McDowell 1-up in the Sam Snead bracket final.
McDowell won the second and third holes to make an early break but Dubuisson fought back to lead 1-up at the end of the front nine.
While Northern Ireland's McDowell dragged himself level twice on the back nine, Dubuisson's win on the 16th hole decided the contest.
The other semi-final will see Rickie Fowler take on Jason Day of Australia.
Fowler defeated fellow American Jim Furyk 1-up, while Day prevailed 2-and-1 against South Africa's Louis Oosthuizen.