Australia's Michael Hooper made a dominant display in Wallabies loss to South Africa © Getty Images

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News: 'Run out of excuses as a team' - Quade Cooper

Matches: South Africa 28 - 8 Australia

Ewen McKenzie has flagged changes to his starting XV to play Argentina in The Rugby Championship Test in Rosario on Saturday, saying he tracks ''repetitions of errors" after noting that Will Genia, Matt Toomua, Benn Robinson and Ben McCalman all performed well off the bench against South Africa in Cape Town.

"If we're not getting the outcome we want, we'll have to see if there's someone else that can give it,'' McKenzie said after the Wallabies succumbed to another dispiriting loss against the Springboks.

Genia, in particular, made an immediate impact when he replaced Nic White at half-time, driving much of the Wallabies' attack in the second stanza and sparking an improvement from Quade Cooper. McKenzie would not be drawn on whether he would start his former first-choice No.9 against Argentina in Rosario, after benching him against the Pumas in Perth and the Springboks at Newlands for previous disappointing efforts, but said that Genia's energy in attack and defence was pleasing.

ESPNscrum correspondent Greg Growden also noted that McCalman was "easily the most effective of the Wallabies replacements" when he went on for Ben Mowen at No.8, "because, unlike some of his teammates, he did not tippy-toe his way around the breakdown".

Match Analysis by ESPNscrum's Graham Jenkins

• Man of the Match: It is two years since Fourie du Preez started a game for the Springboks but you could hardly tell with the classy scrum-half a prominent figure throughout the game. His vision, distribution and experience are key parts of the Boks' armoury and they will be hoping for a repeat performance from their No.9 when the All Blacks come to play next weekend.
• Key Moment: Flip van der Merwe's yellow card in the closing moments of the first half put the Boks on the back foot and from that point they struggled to regain the momentum that threatened to blow the Wallabies away. As a result they only notched one more try and missed out on what could be a valuable bonus point.
• Hero of the Game: Boks winger Willie le Roux may not have clocked up as many metres with ball in hand as some of his team-mates but his all-round industry and his superb finishing skills earn him the nod here.
• Villain of the Game: Springboks lock Flip van der Merwe can consider himself very lucky to have escaped with just a yellow card for leading with an elbow as he looked to make a tackle. He can probably expect a call from the citing commissioner for what should arguably have been a red card while his team-mate Jannie du Plessis may also find himself in trouble for clawing at the face of Wallabies hooker Stephen Moore.
• Talking Point: Regardless of the All Blacks' result against Argentina later today, the stage is now set for a title showdown between the world's two best sides - South Africa and New Zealand - in Johannesburg next weekend. Can the Boks avenge their defeat in Auckland and deny the All Blacks back-to-back Rugby Championship titles?
• Play of the Game: Zane Kirchner's try for South Africa was a wonderful sweeping move but our vote goes to Australia for Quade Cooper's exquisite cross kick that found debutant Chris Feauai-Sautia who then evaded a couple of tackle before touching down for a score.

McKenzie said the Wallabies "didn't get the game right" in Cape Town. "We were 20 points off and we're way off the mark at the moment. This is sheep station stuff. You are playing the best teams in the world. You can't be loose. That's the one thing in Test rugby that is unforgiving. It will cost you. We aren't grabbing those moments. Test matches are about composure under pressure. We lack composure at key moments. We are in the space of working out who can handle it and who can't."

Mckenzie's Wallabies have now lost four of their five Rugby Championship Tests since he replaced Robbie Deans as coach and consciously selected a younger squad with long-term development in mind, and he believes the group is struggling because of the collective lack of "maturity". He said that lack of maturity saw the team fail to adapt their failing game plan after slipping behind the Springboks early in Cape Town - sticking to the ''kick first'' tactics after South Africa had scored 20 points in 10 minutes.

''We talked about that mid-first half, where we were going to play and kick from, [and] that didn't quite transpire,'' he said. ''We had opportunities to attack and we were probably still a bit too conservative ... we were a bit slow off the mark in making that adjustment." McKenzie said "it's a combination of things that are letting us down consistently".

"It's very frustrating at the moment. I feel like I say that every second week. There is a maturing aspect we need to develop. We have guys battling away. They're certainly playing with more character now, but there are execution errors that put us under pressure, and until we sort those out it's hard work."

McKenzie suggested that he would also keep the players on the pitch at half-time in Rosario after trying the tactic in Cape Town.

"I felt that our weakness had been in the second half and we were maybe relaxing too much in the dressing room," McKenzie said of his decision at Newlands. "We weren't getting the outcome in the second half so I thought we'd stay out in the environment and the players enjoyed it. We've been doing it for the last 100 years and it's only in the last 10 that we've gone inside, and it worked quite well."

McKenzie said he was open to trying new things to get the best out of his side. But he didn't go as far as giving them oranges. "I was going to take oranges on but I didn't think the players would appreciate the humour."