Ross Fisher has recorded a second-round 65 to open up a one-shot lead at the halfway stage of the Tshwane Open.
The world number 82 hit five birdies and an eagle during a faultless performance in Centurion to edge ahead of Denmark's Morten Orum Madsen.
Madsen also fired a round of 65 to hold a slender advantage over third-place duo Simon Dyson and Carlos Del Moral.
Italy's Edoardo Molinari ended the day four shots off the lead on nine-under-par, while in-form South African pair Thomas Aiken and George Coetzee concluded their round in 36th position.
