Denmark's Marten Orum Madsen and Englishman David Horsey share the lead at the Tshwane Open following first-round 63s in South Africa.

Both competitors hit seven-under on the course, with Madsen recovering from a fourth-hole bogey to hit two consecutive eagles on the front nine.

Horsey did not drop a shot throughout the entire day and scored seven birdies to keep himself in contention for the title in these early stages.

Wallie Coetsee and Brett Rumford sit one shot off the pace, while Raphael Jacquelin, Dean Burmester, Keith Horne and Merrick Bremner are all tied fifth.