Victor Dubuisson moved into a one-shot lead on day two of the Nedbank Golf Challenge hosted by Gary Player as high winds made scoring very difficult in Sun City.
After a low-scoring first day of the seventh Rolex Series event of the season, it was all change on Friday with the elite field gathered at Gary Player Country Club struggling against the wind.
A birdie on the fourth was enough to move Dubuisson to five under, a shot ahead of Shane Lowry and two clear of overnight leader Bernd Wiesberger, Scott Jamieson, Charl Schwartzel, Julian Suri, Hideto Tanihara and Lee Westwood.
Irishman Lowry began the day five shots off the lead but birdied the second and fifth for the second round running to make inroads while Tanihara made a birdie on the first.
When home favourite Schwartzel and defending champion Alex Noren both took advantage of the par five, every member of the third-last trio out was just a shot off the lead.
Scotland's Jamieson looked dialled-in early, putting his approach on the first to six feet to join the lead but when he three-putted from just off the fringe on the second, he was back at four under.
He was joined there by Lowry who made more birdies at the seventh and ninth to turn in 32 but a Branden Grace bogey on the second dropped him back while Swede Noren had to take a drop on the third to surrender a double-bogey.
Japan's Tanihara gave a shot back on the third as the pack looked to be moving backwards but Lowry bucked that trend, making it back-to-back birdies on the tenth to join the lead.
Schwartzel made a double-bogey on the third after putting his tee-shot into the deepest rough on the left and Wiesberger, Suri and Dubuisson's par-par starts were looking very good indeed.
American Suri's steady start was blemished by a bogey on the third where Grace made a double.
Schwartzel hit a good tee-shot into the par three fourth to regain a stroke but Austrian Wiesberger soon led on his own as Lowry made a first bogey of the day on the 11th.
Jamieson made it back-to-back bogeys on the third but there were some gains to be made as Westwood holed a monster putt on the eighth and Grace picked up a shot on the fourth.
Dubuisson holed a 15-footer on the fourth green to share the lead and with Wiesberger finding a bunker off the tee that took him two attempts to get out of, the Frenchman led on his own.
Grace and Noren were in a group of ten players at two under that also included home hero Louis Oosthuizen.