The in-form van Tonder birdied the third extra hole at Karen Country Club after the leading pair had finished tied on 21-under par following a day of remarkable low scoring on Friday.

The top four all shot final rounds of 64, but England's Sam Horsfield and Scotland's Calum Hill both crucially bogeyed the 72nd hole to miss out on the play-off by a single shot.

In contrast, van Tonder recovered from dropping shots on the 14th and 15th to birdie the 18th from 40 feet and pile the pressure on Janewattananond, who parred the last two holes following a bogey on the 16th.

Van Tonder lipped out for birdie on the first extra hole and the second was also halved in par fours before the 30-year-old produced a superb approach to the third and converted the birdie putt from two feet for his fifth victory in his last 13 events..

"I've been playing well and working hard on the game, I'm overwhelmed," said van Tonder, whose wife Abi is his caddie.

"My wife and I have been a great team.

"I told her on the last hole (in regulation) that I'd put myself on the green, give myself a chance to make a putt … and I did.

"It was very special. She's been on the bag for seven years. She's been with me through thick and thin.

"Last year I had four wins on the Sunshine Tour, then COVID happened and it made everything a bit hard travel-wise and getting into tournaments.

"It wasn't easy. I had to work hard and keep myself motivated. It paid off, so I'm very happy."

South Africa's Jacques Kruyswijk and Scotland's David Drysdale shared fifth place on 18 under par after closing rounds of 64 and 67 respectively.

Justin Harding, who was seeking back-to-back wins on the same course in the space of six days, took a three-shot lead into the final round but struggled to a 73 to finish in a tie for 14th.

Queensland veteran Scott Hend finished as leading Australian in joint 42nd position on nine-under overall after a final round 67 while Maverick Antcliff finished a shot behind after his last round of 72.