Charlie Nicholas has revealed he's joined the Ange Postecoglou fan club.
The pundit and former Celtic star insists he is now a "fully paid-up supporter" of the new manager and his team.
Nicholas has been one of his former club's most vociferous critics in recent times and was particularly scathing of Neil Lennon and the drawn out process of appointing his successor.
But he returned to Celtic Park for the first time since Postecoglou took the job and watched his side beat St Johnstone 2-0 on Saturday.
The 59-year-old now believes Celtic have the potential to push champions Rangers all the way in the Premiership title race.
"I became a fully paid-up supporter of Ange Postecoglou's Celtic at the weekend," Nicholas wrote in The Express.
"I was back in the Parkhead stands on Saturday with two of my brothers-in-law for the win over St Johnstone.
"It was my first time in a while after TV commitments and everything else. I have always wanted to get back to the games with all the changes that have happened at Celtic.
"The team is definitely heading in the right direction.
"I had always said it would be October or November before we can really judge Ange.
"I know Ange suggests he only has a Plan A but I do think he has other options in his head. I wanted to see his team for myself and how he is trying to piece all these new signings together.
"I really do think Celtic can squeeze Rangers all the way in this Premiership race.
"I still think that Rangers are favourites but I like what the new Celtic boss is building.
"Rangers are ahead in the table and they also have key players coming back.
"They are more solid and because of that they have the advantage over Celtic.
"But I can definitely see this Celtic team clicking and challenging Rangers. I saw that first-hand at the weekend.
"I admit that defensive strategies and building from the back are not things I am big into. Ange has clearly built from the front.
"I was at the St Johnstone game and it gave me a really good insight."
Nicholas pinpointed Kyogo Furuhashi as the key to Postecoglou's system, even though he played off the right flank rather than as a central striker against Saints.
And he was struck by how the manager has already captured hearts and minds on the terraces.
He said: "Celtic were deserved winners and, on that him performance, you have to question how St Johnstone won two cups last season.
"Celtic, however, were the main focus of my visit. Jota is capturing the imagination just now but Kyogo Furuhashi is the key, even though he played on the right at the weekend.
"He never got into the game but he is better more centrally.
"Liel Abada started well at Celtic but has tailed away, Tom Rogic has come back into form and Giorgos Giakoumakis's first steps look encouraging. A lot of the players aren't going to fit into Ange's system but there is still a lot of encouragement there for me.
"Also, being amongst the fans you can see there is a general abundance of patience for what the manager is trying to build.
"You can see they like it and are prepared to stick by him.
"Ange has built up a respect that will buy him time."
