IT's one year ago to the day since Ange Postecoglou took charge of Celtic. 

The Australian was appointed off the back of a bitterly disappointing campaign, and the club in a state of flux following a very long chase for Eddie Howe. 

Results in the early stages did not look promising, with Champions League hopes dashed in the qualifiers and three defeats in the first six league games. 

But things started to turn. Postecoglou had firmly implemented his preferred playing style. His new signings had started to shine. Results were racking up. 

League Cup success came first, then of course the title. Nobody of a Celtic persuaion could have foreseen how quickly the ex-Aussie boss would turn the fortunes of the club around. 

Exactly 12-months on, Postecoglou has been reflecting on his time in Glasgow, as he gets set to go again for pre-season in the coming weeks.

He told Sky Sports: "I've had a lot of success but this is definitely the hardest challenge and the hardest year I've ever had," said the former Australian manager as he reflected on 365 days in charge.

"I did an interview after the game and I couldn't put into words exactly what was the strongest emotion.

"I think looking back now and the way we finished off in the last game, I think there was a part of me that said, 'no, I don't want this to be the full stop'.

"This season was about building the first foundation of a team that I hope will be competing and be successful in the Premiership for the next few years."

He continued: "My role is to make us better next year, we need to be better.

"It's the same in the Champions League, our role is to get there and make an impact.

"It's not just about making an impact next year, it's about building a team that will continually make an impact and that takes time.

"We've had a process, we've had success in the transfer market without a massive spend. That's the club we are and that's the area I want us to continue to grow in and that's what we'll do."