Max Homa started the day with a one-shot lead and produced six birdies, an eagle at the par-5 9th and two bogeys for a 66 on Sunday, reaching 19-under to win the Nedbank Golf Challenge by four shots.
“It's been a dream 10 or 11 days,” said the American. “It was a crazy day – I got off to such a great start and Thorbjørn was playing unbelievable. He kept pushing us along and Nicolai was playing phenomenal golf so it was fun.
“Its kind of what you dream of, you want to be in the fight and it was fun to close it out at the end.
“It's been tremendous to get to travel to a new place, meet so many amazing people, the fans have been amazing. Everyone has been so welcoming and kind. To come out with a trophy is just a cherry on top.”
Denmark's Nicolai Højgaard carded a bogey-free 68 to finish second at 15-under.
Fellow Dane Thorbjørn Olesen briefly caught up to Homa before the latter's eagle but two bogeys and a double bogey at the par-5 17th led to a 69 to finish third at 14-under.
American Justin Thomas closed with a 66 for fourth place at 12-under, one ahead of England's Dan Bradbury who shot 71 to finish fifth.