"Here was a guy who only weeks before had told me how much he was enjoying the environment and how excited he was to get himself into the best physical shape for the Olympics," Tietjens writes. "Now he was telling me he was refocusing on the fifteens game. I didn't need to ask him for an explanation, so I wished him luck and left it at that."
After the All Blacks v Argentina test in Christchurch in July 2015, Tietjens had a meeting with All Blacks coaches Steve Hansen and Ian Foster and NZ Rugby's chief executive Steve Tew, general manager of rugby Neil Sorensen and high performance manager Don Tricker.
The meeting was to sort out which players would be available for Tietjens, who had stated that all players would need to be involved in at least four matches of the 2016 sevens World Series to be considered.
"It was ostensibly a negotiation, though it felt more like a Dickensian production," Tietjens writes. "I was Oliver Twist, and there was no way I was getting more.
"I soon realised I had absolutely no power in that meeting. Steve Hansen wanted to know why I required Ben Smith for four tournaments. In his mind, Ben was good enough as it was. I explained to him to that to be good at the game, you have to be playing it, and Ben hadn't played sevens since 2010. I wouldn't budge on that, and therefore had no Ben Smith.
"When we talked about Beauden Barrett, I asked if anyone could tell me why a guy who seemed to so keen initially had now completely changed his mind. Neil Sorensen looked at Ian Foster and asked him what he had talked to Beauden about. Ian said he had never told him he couldn't play sevens, he had only outlined a list of things he needed to work on in the fifteens game.
"I eventually left the meeting feeling completely isolated and that no leadership had been shown there. New Zealand Rugby had a documented strategic goal that proclaimed gold medals in the men's and women's sevens competition to be the number one priority in the 2016 season. I was therefore very surprised that no one spoke up to defend the programme, or my right to prepare players as I saw fit. A couple of months after the meeting, once I was back to my own preparations, I received a text message from Neil Sorensen. He wrote: 'I admire you for the way you handled the disgrace that was the AB-7's selection issue. Your integrity remains intact'."
Tietjens' team was badly affected by injury before and during the Olympics. Augustine Pulu, Ben Lam and Joe Webber were ruled out beforehand, and at the Hong Kong tournament he lost DJ Forbes and Sam Dickson. Sonny Bill Williams ruptured his Achilles during the Rio tournament.
In March 2015, Tietjens sent an email to Tricker and Sorensen, saying he desperately needed players with "game-breaking qualities" which had proven to be the difference in the Wellington and Sydney World Series tournaments of that year.
"I listed players I would like to consider, once again including Beauden Barrett and Ben Smith and adding Vaea Fifita, Julian Savea, Seta Tamanivalu, Sione Fifita, Jone Macilai, Patrick Osborne, Vince Aso and Nehe Milner-Skudder.
"It was a plea for help, really, from a desperate coach. I didn't not receive a single reply.
Instead, not long after that email was sent, I received a phone call from Ardie Savea. He was out, too. I cannot tell you how devastated I was to receive that news."
Tietjens, inducted in World Rugby's hall of fame and regarded as the greatest sevens coach in history with four Commonwealth Games gold medals, 12 World Series titles and two sevens World Cup titles to his name, left his New Zealand position last year and turned down several offers from around the world to coach Samoa instead.
Legacy: Sir Gordon Tietjens is out now for $39.99 at all leading bookstores
