Charl Schwartzel turned in a brilliant four under par 31 to pull clear of playing partner Gregory Bourdy during the third round of the Alfred Dunhill Championship at Leopard Creek.
Locked together on 13 under par overnight – four clear of the rest of the field – 28 year old Schwartzel continued the sensational form that saw him win by 11 shots in Thailand last week to establish a two shot lead over his French playing partner.
The 30 year old Bourdy bogeyed the opening hole, before both players knocked in putts from inside five feet at the par five second for birdies.
The 2011 Masters Tournament champion looked like doubling his advantage when he rolled in a seven foot birdie putt at the fourth, but Bourdy followed him in from five feet.
Both players found the green in one at the driveable par four sixth and walked off with birdies, although Schwartzel may feel he should have done better after a magnificent three wood to six feet.
Schwartzel was threatening to establish huge lead once more when he hit his tee shot to two feet at the seventh and rolled in a ten footer at the eighth to reach 18 under, but after his tee shot finished behind a tree at the ninth he dropped his first shot of the week to be 17 under at the turn.
Bourdy was two behind, with a further three shots back to Keith Horne – who remarkably aced the short 12th for the second day running.
Three-time European Tour winner Bourdy leaked his drive right at the tenth and, after a taking a drop, did well to rescue a bogey.
The gap then extended to five as Schwartzel rolled in a ten foot birdie effort at the 12th and Bourdy failed to get up-and-down from a greenside bunker.