After winning the Rugby Championship last week in Argentina, both coaches have mixed it up for this weeks test in Pretoria.
Neither picked their strongest team as they try and figure out a balance before they have to reduce their squads to 31 players for the World Cup.
The result of this test match does matter as any test any nation play but more important will be how the players will take the opportunity to show the coaches that they should be in that 31-man squad.
There are some excitement among the Springbok squad and this week sees the return of Springbok captain Kolisi which is something Erasmus hope will be successful.
Although Kolisi is not yet test match ready he dis ask his captain to give it his all for as long as he can.
He help Kolisi in not adding the extra pressure of leading the team which will see Schalk Brits lead the Springboks for the first time at Loftus.
There is a lot of the same players in the starting XV which beat the Aussies a few weeks ago in Johannesburg.
In the midfield Kriel and Esterhuizen take their places again with Gelant at fullback. On the wings Leyds and Nkosi gets another change to impress the coach as well.
Erasmus went with Cobus Reinach and Elton Jantjies as his halfback pair with Faf de Klerk covering on the bench this week.
A new loose trio in Kolis and Elstadt with Marcell Coetzee getting a chance at number 8.
A Bulls second row in De Jager en Snyman will pack behind Koch, Brits and Du Toit.
Scarra Ntubeni is set to make his Springbok debut off the bench. This is a strong team that will face a totally different Argentina team.
Pablo Matera, loose forward Javier Ortega Desio and centre Jeronimo de la Fuente are the only survivors from last weeks test.
It will be interesting to see how these two teams go about their business this weekend and hopefully for the Pretoria fans they will see another Springbok victory before they jet-off to Japan.
South Africa: 15 Warrick Gelant, 14 S’bu Nkosi, 13 Jesse Kriel, 12 Andre Esterhuizen, 11 Dillyn Leyds, 10 Elton Jantjies, 9 Cobus Reinach, 8 Marcell Coetzee, 7 Rynhardt Elstadt, 6 Siya Kolisi, 5 Lood de Jager, 4 RG Snyman, 3 Vincent Koch, 2 Schalk Brits (captain), 1 Thomas du Toit
Replacements: 16 Scarra Ntubeni, 17 Lizo Gqoboka, 18 Wilco Louw, 19 Marvin Orie, 20 Marco van Staden, 21 Kwagga Smith, 22 Faf de Klerk, 23 Frans Steyn
Argentina: 15 Joaquin Tuculet, 14 Sebastian Cancelliere, 13 Jeronimo de la Fuente, 12 Lucas Mensa, 11 Ramiro Moyano, 10 Joaquin Diaz Bonilla, 9 Felipe Ezcurra, 8 Javier Ortega Desio, 7 Marcos Kremer, 6 Pablo Matera (captain), 5 Tomas Lavanini, 4 Guido Petti, 3 Santiago Medrano, 2 Julian Montoya, 1 Mayco Vivas
Replacements:: 16 Agustin Creevy, 17 Nahuel Tetaz Chaparro, 18 Juan Figallo, 19 Matias Alemanno, 20 Tomas Lezana, 21 Gonzalo Bertanou, 22 Benjamin Urdapilleta, 23 Santiago Carreras