Leinster have lost two Champions Cup finals, to Toulouse and to Bordeaux-Begles, and a semi-final to Northampton Saints since he joined the operation in late 2023, and the focus on a divisive blitz defence has not helped win over detractors.

Speaking to the media ahead of next Saturday’s URC semi-final at home to the Stormers, Nienaber was asked straight out if he would still be with the club next term. His answer cast immediate doubt on that.

“I hope so. Okay. Currently I'm not sure, to be honest.” 

And why?

“Because I don’t think people value me here. They don’t value me here. They don’t.” 

This wasn’t a comment aimed at anyone inside the club. He believes the dressing-room remains with him. It is the fourth estate and disgruntled supporters at large that, according to him, will ultimately decide his future.

“Let me put it to you this way: who fires you? Do you know who fires you? The public, the media. They fire you. Not the CEO, not Shane [Nolan].

“He doesn't fire me, but you guys fire us. Fire all coaches, because the pressure builds up and builds up, and the fan then builds the pressure on them, and then they just ask this and say, ‘listen lads, I think we must part ways.” 

Nienaber misquoted an article by one journalist in which it was said Leinster had ‘done a deal with the devil’ by bringing him on board. And he engaged in a frank but respectful back and forth on this and wider issues with the same writer on Monday.

This was the second time in six months where Nienaber had seen fit to talk bluntly about his future at a weekly press conference having previously addressed comments he made to South African media at a similar event back in December.

And this was the second back and forth between a Leinster coach and a journalist in just three days. It followed on from Leo Cullen’s sometimes bizarre engagement with a radio reporter when asked about pressure after the weekend’s defeat of the Lions in Dublin.

Cullen has also said that all aspects of the club’s rugby operation is fair game when it comes to investigating reasons for their ongoing inability to get over the line in Europe. He included Nienaber’s defensive system when asked specifically about that.

That in-your-face approach has become synonymous with the former Bok coach but he utilised a drift defence during a six-year stint with the Stormers. Whatever path is taken, he said, would be for the benefit of the club.

“It’s not the case that I don’t understand the other system. I understand it, but both systems… There’s not one that’s better than the other. That’s why people are playing linespeed versus drift defence off against each other.

“You must believe in one, the team must believe in one. If the players don’t believe in that anymore, and we have to do a drift defence, it’s ‘can I coach them the best drift defence in the world to make them win?’ If the answer is no, then shit, I’m not the right guy.

“If the answer is ‘yes, I can do it’, that’s the thing. Can you be the best value for the club.” 

All told, Nienaber only sat down for 20 minutes, but acres of ground were covered.

His assessment on Leinster’s heavy defeat to Bordeaux-Begles boiled down essentially to too many mistakes and not being clinical enough. As with the loss to Northampton last year, he saw a myriad of errors rather than any one discernible pattern of concern.

Leinster have made basic mistakes across the season but Nienaber disagrees that their error count is particularly high when placed in the context of their high possession stats. And he argued against the notion that the blitz ‘D’ and a multi-phase attack was sapping energy.

That led on to another interesting exchange.

It was in the interview with South Africa’s Super Sport late last year when Nienaber described himself as the head of Leinster’s rugby operations, but he diluted the influence that holds when it comes to how the team plays.

“I don’t tell Tyler [Bleyendaal] how to attack or Muckers [Robin McBryde] how to maul or how to win a lineout. Running the programme is, you’re co-ordinating all the different areas and making sure that what we decide on a Monday, or let’s say on a Sunday when we meet, ‘listen, what do we need to beat Stormers?’ 

“On a Sunday you will go: ‘review, what was wrong? Preview, what do we need to win’ and then is there areas that overlap. ‘Lads, which are the critical areas’ it’s these areas and then you go ‘okay, how much time are we going to allocate’. We’ve only got like 180 minutes in a week. We’re going to allocate so much time to that. That is running a rugby programme.”