Alexander Björk made a birdie-birdie start to take the solo lead on day three of the Tshwane Open at Pretoria Country Club.
The Swede entered the day level with Scotsman Scott Jamieson at the top of the leaderboard but made two birdies in his first three holes to get to 12 under, with playing partner Jamieson birdieing the third to sit a shot behind.
England's Oliver Fisher was then the clubhouse leader at ten under, with Australian Ben Eccles at the same mark with one hole to play.
Fisher was the man to make the first big move, equalling the lowest round of the week with a 62 before the leaders had even teed off.
The Englishman made birdies on the second, fifth, sixth, seventh, tenth, 12th 16th, 17th and had a putt on the last to equal Jacques Blaauw's course record.
His eagle effort from the fringe brushed the hole but he tapped in for another gain to move 48 places up the leaderboard and join Björk and Jamieson in top spot.
That did not last for long, however, as when the leaders did get under way, Björk put his approach to seven feet and opened with a birdie to move a shot ahead.
The 26 year old was clearly zoned-in and got within ten feet on the next to make another birdie and the lead was quickly up to two shots.
Jamieson then holed a ten-footer of his own on the third to cut the gap back to one as Eccles was reaching the end of his charge through the field.
The Australian made birdies on the second, third, seventh, ninth, 13th, 14th and 17th and was heading up the last just two shots off the lead.
Dean Burmester started with a bogey but then made four birdies in a row to get to nine under after six holes where he was joined by Mikko Korhonen, James Morrison and Justin Walters.
Thomas Aiken and Peter Karmis were then four shots off the lead.
Trevor Immelman had earlier made the seventh hole-in-one of the season at the par three fifth. The 2008 Masters Tournament champion holed a seven iron from 201 yards with what was just his fifth shot on that hole all week.
