Louis Oosthuizen is up to a career-high fourth in the world after coming from five shots back to win the Volvo Golf Champions in Durban.
South Africa's 2010 Open champion shot a closing 66, the joint-lowest final round, to beat Scotland's Scott Jamieson - five clear of the entire field overnight - by one.
Third was Thailand's Thongchai Jaidee and fourth Irishman Padraig Harrington.
Jamieson, who won last month's Nelson Mandela Championship in the same city, is the first player to lose a five-shot 54-hole lead on the European Tour since Hennie Otto at the 2008 Madeira Islands Open.
"Louis's a major champion - there's no shame in losing to him," said the world number 100. "I gave it my all, but it wasn't to be."
He can content himself with the fact that he has started the season first, third and second.
"I'll take that - absolutely," he added.
"The double bogey was a kick in the stones, to put it politely, but I had tons of chances and couldn't take them."