South Africa's Branden Grace holds a three-shot lead at the Alfred Dunhill Championship in his homeland following a first-round 62.
Grace had an unblemished round after hitting 10 birdies, which has placed him in a strong lead heading into the second round.
Jake Roos is the closest challenger to the top spot after carding a seven-under 65 in Malelane, while Englishmen Matt Ford and Danny Willett sit four shots off the pace following rounds of 66.
Charl Schwartzel, who is aiming for a tournament hat-trick, ended the day on three under after his four bogeys diminished the advantage of hitting seven birdies.