South Africa's Branden Grace posted a under 66 on Friday to rocket to the top of the leaderboard after the second round of the Volvo Golf Champions.
Grace finished at 12-under 134 and is four strokes clear at the par-73 Links at Fancourt.
The field is an exclusive one with only winners from last year's European Tour schedule, winners from the first two events of 2012 and current tour members under the age of 50 with more than 10 victories.
Grace was the last man to get into the field. He earned his first European Tour victory Sunday at the Joburg Open.
Lee Slattery fired the low round of the day on Friday with an eight-under 65. He is tied for second place with Thomas Aiken, who carded a three-under 70, at eight-under 138.
The Spaniard shot a five-under 68 and is alone in fourth at minus-seven.
Major winners Retief Goosen (68), Paul Lawrie (68) and Louis Oosthuizen (71) joined Alexander Noren (68), Raphael Jacquelin (69), Hennie Otto (69) and first-round leader Nicolas Colsaerts (76) in a tie for fifth at six-under 140.
MORE TO FOLLOW.