In search of his first win since The Players Championship in 2009, Stenson currently sits at 13-under 131 and leads by four over fellow Swede Magnus Carlsson and first-round leader Merrick Bremner, who still has four holes remaining in his second round after opening with a 64.
'There's still a lot of golf to be played,' Stenson told reporters after his round. 'I've put myself in a nice position going into the weekend, and I'm looking forward to it. I'm eager to win.'
Former Masters champion Charl Schwartzel is among a group tied for eighth at 6 under, seven shots behind Stenson. European Ryder Cup hero Martin Kaymer is two shots further back at 4 under, while Branden Grace, a four-time winner on the European Tour this year, is at 3 under. All three are among the group of 74 players that still had yet to complete their round at the Serengeti Golf & Wildlife Estate when play was halted due to storms.
The second round is set to resume at 7:30 a.m. local time on Saturday.