Charl Schwartzel left Rory McIlroy needing a victory over Tiger Woods before play was abandoned for the day at the Turkish Airlines World Golf final - where all eight players could still qualify for the semi-finals.
World Number One McIlroy chipped in for birdie on the final hole of his match with Schwartzel this morning, only to see the former Masters Tournament Champion follow him in from 12 feet.
That meant a one shot victory for the South African and a second straight defeat for McIlroy.
"It was actually a decent match,” said the Northern Irishman. “I felt like I played a bit better today, had plenty of chances and just didn't really hole much. I got off to a better start and Charl played solid and then birdied three of the last four so I couldn't really do much about that."
Woods had lost to Schwartzel yesterday but today beat Ryder Cup team-mate Matt Kuchar by five shots. Victories for Schwartzel and McIlroy in the delayed final group matches would see Schwartzel through to the semi-finals on three points with McIlroy, Woods and Kuchar all on one point.
The lowest aggregate score for each player's three matches would then be used to break the tie, with one player joining Schwartzel in the last four.
The same scenario could also unfold in Group Two. Justin Rose is top with two points after beating Lee Westwood (66 to 69), with Webb Simpson joining Westwood on one point after beating Hunter Mahan.
Rose faces Simpson and Westwood takes on Mahan in the remaining matches.