Theron beefs up Baby Bok pack for Argentina
Theron's side will face off against Argentina in the Junior World Cup at the AJ Bell Stadium in Manchester.
These changes include two positional switches in the backline with Manie Libbok and Curwin Bosch swapping positions between flyhalf and fullback.
The backline also shows one personnel change with Franco Naude taking over at inside centre from JT Jackson.
Up front props Franco van den Berg and Carlü Sadie replace Kwenzo Blose and Jaco Holtzhausen respectively, and lock Eduard Zandberg comes in for Cobus Wiese.
Theron named a new-look bench with prop Nicolaas Oosthuizen, scrumhalf Marco Jansen van Vuren and wing Edwill van der Merwe earning their first call-ups in the tournament.
Hooker Jan-Henning Campher and lock Ruben de Villiers retained their places among the replacements and will be joined by Wiese who will provide loose forward cover.
"We are expecting wet weather for this clash, so we decided to beef up our pack," said Theron.
"We also brought in Curwin Bosch at flyhalf because he is the best tactical kicker in the group at this point, and in wet conditions the tactical kicking has to be good.
"Ideally we would like to play the style of rugby that we played in the second half against Japan, but the wet weather could create a challenge in that regard.
However, if we produce solid set pieces and balance that with smart tactical kicking and use our skills hopefully the results will follow."
Theron expected Argentina to provide a tough challenge all around and said his team had to be switched on for the full duration of the match to counter the challenge.
"Argentina are a disruptive team by nature as we have seen over the last few years and also in their opening match against France," said the coach.
"They are particularly tenacious on the ground and they like to get in behind teams and off-load.
"They will certainly be motivated to beat us after their victory against France, so we have to be ready for the challenge."
South Africa Under-20: 15 Manie Libbok, 14 Sibusiso Nkosi, 13 Jeremy Ward (captain), 12 Franco Naude, 11 Mosolwa Mafuma, 10 Curwin Bosch, 9 James Hall, 8 Junior Pokomela, 7 Ernst van Rhyn, 6 Zain Davids, 5 Eli Snyman, 4 Eduard Zandberg, 3 Carlü Sadie, 2 Tango Balekile, 1 Franco van den Berg.
Replacements: 16 Jan-Henning Campher, 17 Nicolaas Oosthuizen, 18 Jaco Holtzhausen, 19 Ruben de Villiers, 20 Cobus Wiese, 21 Marco Jansen van Vuren, 22 JT Jackson, 23 Edwill van der Merwe.
Date: Saturday, June 11
Venue: AJ Bell Stadium, Salford
Kick-off: 18.00 (19.00 SA time; 14.00 Argentina time)
Referee: Craig Evans (Wales)
Assistant referees: Thomas Charabas (France), Greg MacDonald (England)
TMO: Geoff Warren (England)
