Poland's Adrian Meronk and Frenchman Robin Roussel hit seven-under-par 65s to share the lead by one stroke after the first round of the Alfred Dunhill Championship at Leopard Creek Country Club on Thursday.
Roussel hit five successive birdies on the back nine after a slow start, while Meronk had two eagles in his round at the picturesque European Tour event on the border of the Kruger Park.
Scott Jamieson of Scotland, among the last finishing the round, carded four birdies in his last five holes to end the day in third place with a 66.
Cormac Sharvin is the leading Irish challenger on level par, seven shots off the lead, after carding a 72.
He is a further seven shots clear of Jonathan Caldwell who struggled on the opening day and languishes on seven over after a 79.
The Northern Irishman birdied the first and sixth. But three double bogeys on the fifth, 15th and 18th coupled with further bogeys on the eighth, ninth and 12th saw him plummet 14 shots off the leaders.