The match will be played in Durban at Hollywoodbets Kings Park. Nienaber made two changes while he named six forwards and two backs on the replacements bench.
With Damian Willemse having been ruled out, Frans Steyn will start at flyhalf while Pieter Steph du Toit comes back to the XI at a flanker replacing Franco Mostert.
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Bongi Mbonambi also makes a return as he has been out due to knee injury while Kurt-Lee Arendse has completed his suspension.
“We showed in the first half last week what we are capable of and our fighting spirit in the dying minutes was admirable,” said Nienaber as per SA Rugby website.
“That made it easy for us to opt for continuity in selection in the starting lineup. Obviously the one change was injury enforced as Damian Willemse has been ruled out due to concussion, and we were pleased the calmness Frans Steyn brought at flyhalf when Damian left the field.
“The energy and enthusiasm Pieter-Steph has been showing at training has also been great, and we know what he is capable of in this loose trio, so I am sure he will make an impact among the loose forwards.”
With regards to having six forwards and two backs on the bench, Nienaber said: “We know what challenges Argentina will pose and we feel that this would be the best option for us for this match specifically.
“We have a group of hungry and talented players serving in the bomb squad this week and every player in the match day squad knows what is expected of them if we want to win the Castle Lager Rugby Championship.”
“We viewed last week as a semi-final and this week as a final, but Argentina are a team that do not give an inch, and they never stop fighting as we saw last week.
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“They defeated New Zealand away from home against the odds and they registered a convincing victory against Australia at home, so we know we are in for a massive battle.
“There will be a few keys to victory this week, and these include set piece dominance, using our opportunities and ensuring that we do the right things in specific areas of the field.
“It is all or nothing for us this week, and we have a team with several players who have won the Rugby World Cup and the British & Irish Lions Series, so they know it will take nothing less than a quality 80-minute effort to win this match and the competition.”
Nienaber added they expected a titanic battle:
“They are one of the teams whose patriotism radiates in their performances. They are strong in the set pieces and have talented backs and they will challenge us in every department.
“They also never give up, as they showed in the second half last week to bounce back from 22-6 down to 22-20, and they will draw a lot of confidence from that going into this match.
“This is a massive game for both teams, so we need to be switched on mentally and physically from start to end of the match.”
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Springbok team to face Argentina in Durban:
15 – Willie le Roux (Toyota Verblitz) – 78 caps, 65 pts (13t)
14 – Canan Moodie (Vodacom Bulls) – 2 caps, 5pts (1t)
13 – Jesse Kriel (Canon Eagles) – 55 caps, 60 pts (12t)
12 – Damian de Allende (Wild Knights) – 65 caps, 45 pts, (9t)
11 – Makazole Mapimpi (Cell C Sharks) – 32 caps, 110 pts (22t)
10 – Frans Steyn (Toyota Cheetahs) – 77 caps, 156 pts (11t, 10c, 24p, 3d)
9 – Jaden Hendrikse (Cell C Sharks) – 9 caps, 10 pts (2t)
8 – Jasper Wiese (Leicester Tigers) – 17 caps, 0 pts
7 – Pieter-Steph du Toit (Toyota Verblitz) – 63 caps, 15 pts (3t)
6 – Siya Kolisi (captain, Cell C Sharks) – 70 caps, 35 pts (7t)
5 – Lood de Jager (Wild Knights) – 63 caps, 25 pts (5t)
4 – Eben Etzebeth (Cell C Sharks) – 105 caps, 15 pts (3t)
3 – Frans Malherbe (DHL Stormers) – 53 caps, 5 pts (1t)
2 – Malcolm Marx (Kubota Spears) – 54 caps, 65 pts (13t)
1 – Steven Kitshoff (DHL Stormers) – 66 caps, 5 pts (1t)
16 – Bongi Mbonambi (Cell C Sharks) – 51 caps, 55 pts (11t)
17 – Ox Nche (Cell C Sharks) – 14 caps, 0 pts
18 – Vincent Koch (Wasps) – 36 caps, 0 pts
19 – Franco Mostert (Honda Heat) – 58 caps, 10 pts (2t)
20 – Duane Vermeulen (Ulster) – 64 caps, 15 pts (3t)
21 – Kwagga Smith (Shizuoka Blue Revs) – 26 caps, 15 pts (3t)
22 – Faf de Klerk (Yokohama Canon Eagles) – 41 caps, 25 pts (5t)
23 – Kurt-Lee Arendse (Vodacom Bulls) – 2 caps, 5 pts (1t)