Rory McIlroy will have to overturn a three-shot deficit if he is to get 2017 off to a winning start at the BMW SA Open.
The world No. 2 overcame a back problem to fire a 67 in round three at Glendower Golf Club but that was not enough to close the gap on England's Graeme Storm, who also shot a 67 to get to 17 under.
A win for Storm would represent a remarkable comeback for a player who lost his European Tour card by just €100 83 days ago but was handed a reprieve when United States Ryder Cup star Patrick Reed failed to play enough events.