Dan Kriel will start on the wing in the only change to the Junior Boks' starting line-up for the Junior World Championship final against England on Friday.
Kriel, who has featured at both centre and fullback during the tournament, will take the place of Lloyd Greeff on the right wing.
On the bench, Jean-Luc du Preez makes a return, having missed the last two matches after suffering a head-knock against the Baby Blacks during the pool stages.
Meanwhile, England have named an unchanged team from the one that breezed passed Ireland into Friday's final. Lock Maro Itoje will continue to skipper the side, while tour captain Callum Braley will play off the bench.
Friday's final pits the previous two winners, and the tournament's only two unbeaten teams, against each other in what should be an enthralling affair.
South Africa U20 – 15 Warrick Gelant, 14 Dan Kriel, 13 Jesse Kriel, 12 André Esterhuizen, 11 Sergeal Petersen, 10 Handré Pollard (c), 9 JP Smith, 8 Aidon Davis, 7 Cyle Brink, 6 Jacques Vermeulen, 5 Nico Janse van Rensburg, 4 JD Schickerling, 3 Dayan van der Westhuizen, 2 Corniel Els, 1 Thomas du Toit.
Subs: 16 Joseph Dweba, 17 Pierre Schoeman, 18 Wilco Louw, 19 Victor Sekekete, 20 Jean-Luc du Preez, 21 Zee Mkhabela, 22 Jean-Luc du Plessis, 23 Duhan van der Merwe.
England U20 – 15 Aaron Morris, 14 Howard Packman, 13 Nick Tompkins, 12 Harry Sloan, 11 Nathan Earle, 10 Billy Burns, 9 Henry Taylor, 8 Danny Hobbs-Awoyemi, 7 Tom Woolstencroft, 6 Paul Hill, 5 Maro Itoje (c), 4 Charlie Ewels, 3 Ross Moriarty, 2 Gus Jones, 1 James Chisholm.
Subs: 16 Jack Walker, 17 Alex Lundberg, 18 Biyi Alo, 19 Hayden Thompson-Stringer, 20 Joel Conlon, 21 Callum Braley, 22 Sam Olver, 23 Henry Purdy.
Photo: Anthony Au-Yeung/Getty Images