Sun City - Sweden's Henrik Stenson was still in a five-shot lead when lightning forced a delay in play in the second round of the Sun City Challenge at the Gary Player Country Club on Friday.
Stenson had just completed the first nine holes in 34 strokes, two under par, with superb approach play bringing him birdies on the par-five second and ninth holes and on the par-four fifth.
The 32-year-old followed up his course-record-equalling 63 on the first day by moving to 11-under-par overall.
South African Rory Sabbatini, South Korean KJ Choi and European number one Robert Karlsson were the chasing pack trying to make a charge.
Sabbatini also went out in 34 shots to move to six-under-par, while Choi and Karlsson both fired four birdies and did not drop any shots on their way to four-under-par overall.