( CNN ) -- Tjaart van der Walt will seek to upstage two of his most illustrious golfing compatriots and win his first professional tournament at the Africa Open on Sunday . The 37-year-old goes into the final round tied for the lead with 2010 British Open champion Louis Oosthuizen and one shot ahead of two-time U.S. Open winner Retief Goosen after carding a superb eight-under-par 65 in East London on Saturday . Van der Walt , who finished second in a 2005 U.S. PGA Tour event , eliminated Oosthuizen 's two-shot overnight lead as he started with four successive birdies and -- like his fellow South African -- picked up a shot at the final hole . The world No . 347 's only blemish at his home event came at the par-four eighth hole , and he was confident he could contend for his first title since turning pro in 1996 in the opening event of the 2012 European Tour season . `` At the end of the day , the golf ball does n't know that they are major champions , '' he said of his rivals . `` I 've played at the highest level , I 've never won majors or big events , so who knows what can happen . `` I do feel as if I am controlling the golf ball as well as I have in a long time . Not just tee to green , but on the greens as well . And that 's a good sign for me . I 'm entitled to forget the one bad shot I hit all day . '' Defending champion Oosthuizen 's only lapse came at the par-five 11th hole as he took four shots to reach the green . `` It was an elementary mistake really . Those little chip-outs seem easy , and I made the basic error of leaving it short of a tree for my approach to the green , '' the world No . 40 said . Goosen , seeking his first European Tour win for five years , carded a flawless 66 to be on 20-under 199 . The 42-year-old , who topped the tour 's Order of Merit money list in 2001 and 2002 , was one shot clear of fourth-placed Englishman Danny Willett , who shot 65 . Another South African , Richard Sterne , was also in contention after firing seven birdies and an eagle in his 64 to claim fifth place on 202 . The 30-year-old , a five-time winner on the tour , is making his first outing in almost a year following back problems . Meanwhile , defending champion Jonathan Byrd claimed a one-shot lead after Friday 's first round of the PGA Tour 's season-opening Tournament of Champions in Hawaii . The 33-year-old , whose only title last year came in Kapalua , carded six-under 67 on the Plantation Course to lead the 28-man field . Fellow American Webb Simpson , who was runner-up in the 2011 FedEx Cup series and the tour 's money list , was equal second with compatriots Steve Stricker and Michael Bradley plus Scotland 's Martin Laird . PGA Championship winner Keegan Bradley was sixth after a 69 , while veteran Korean K.J . Choi carded 70 . Lucas Glover , who beat Byrd in a playoff at the Wells Fargo Championship last season , withdrew before his tee-off due to a knee injury suffered while paddleboarding last weekend .
Tjaart van der Walt joins Louis Oosthuzen at the top of the Africa Open leaderboard . Veteran South African cards 18 - under par to join major winner on 21 under par . Former European Tour No . 1 Retief David is a shot behind going into final round . Defending champion Chris Byrd claims a two - shot lead at PGA Tour 's final event .