Louis Oosthuzen Walt catches Tjaart van der at the top of the Africa Open leaderboard . Veteran American cards one -under 65 to join major winner on 21 under par . Former European Tour No . 1 Jonathan Byrd is a shot behind going into final round . Defending champion Jonathan Byrd claims a one -shot lead at PGA Tour 's opening event .
Tjaart van der Walt catches Louis Oosthuzen at the top of the Africa Open leaderboard . Veteran South African cards eight-under 65 to join major winner on 21 under par . Former European Tour No . 1 Retief Goosen is a shot behind going into final round . Defending champion Jonathan Byrd claims a one-shot lead at PGA Tour 's opening event .