Challenge Tour Member Branden Grace edged a stroke clear of the field with a five under par 67 at the Telkom PGA Championship.
A superb chip to within a foot on the last put him clear of European Tour Member George Coetzee.
"I actually thought my second to 18 was on the green," said Grace. "It was the perfect length, but it just bounced back instead of forwards.
"I got a bit lucky there too, because it could have rolled back into the bunker, but it held up and gave me a nice little chip."
Grace is seeking his second professional victory after his maiden Sunshine Tour win in October last year, while Coetzee is looking for his fifth victory - his first since 2008.
After opening rounds of 65 and 64 for each of them, Grace and Coetzee found scoring a little tougher as the race to the finish got closer.
Grace's 67 trumped Coetzee's 68, and it contained his first dropped shot of the week: "I think I just lost concentration for a bit," said Grace of his bogey on the tenth.
