Callum McGregor has pinpointed the moment in Celtic's season that proved pivotal in winning the Premiership title.
The Hoops recaptured the league crown from rivals Rangers and with that booked a ticket into the Champions League proper.
McGregor and Co also lifted the Premier Sports Cup to secure a domestic double in an impressive debut campaign under Ange Postecoglou.
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Things didn't get off to the best of starts last term with Celtic losing out on the opening day against Hearts, a result that the skipper believes proved to be the catalyst for their title success.
He told Sky Sports: "I think the first one against Hearts.
"Off the back of a difficult season, it was very easy for everyone to be negative again after game one.
"At that point we had to get the group together and understand we have to change this, we're the only ones who can change it.
"It's very easy to put your head down and say it's going to be the same again, but the group of players in there were strong.
"I think when you look at the Aberdeen game, it was big in terms of coming off the back of sticky results and the pressure had probably started to build at that point.
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"A difficult away game and to go up there to get a 2-1 win in the last minute.
"I think the most pleasing thing about that was we stuck to our principles, we stuck to the way we want to play and we managed to get the goal in the style we want.
"I think that just gave the players the belief that we can stick to our principles and still win games.
"You don't need to come away from that and start kicking balls into the box and just play the long ball and hope something drops for you.
"I think at that point, the manager's message was clear, this is the way to score goals. We stuck to that, we got the goal and the whole thing starts to breed from there."
Asked how long it took him to believe Postecoglou was the right man to deliver the Scottish Premiership, he added: "I think pretty much straight away.
"He said all the right things and, especially at a club like Celtic, to want to play fast, attacking football that's music to everyone's ears.
"That's what the supporters want to see and that's what the players want to play.
"I think very quickly you saw all his sessions were high tempo and he just wanted the whole thing to be moving all the time.
"You could tell right away that's the type of football he wanted to play and he was just a case of building from there. I think when you set out to play this style of football you have to be all in, you can't be 50-50 or even 80 per cent.
"The manager kept telling us we had to commit, what I'm asking you to do is very, very difficult, there are not a lot of teams that are trying to play this way.
"He asked us to have belief in him and in ourselves and he would get us there. He was adamant we would be successful and he was right.
"The easiest thing in the world is to watch football and criticise, that's the way football is going now.
"I think what we have here is a strong mentality with a strong leader who knows it'll be difficult, but he gave us that belief to go and trust ourselves."
