By Murdo MacLeod
Former Celtic midfielder and assistant manager
Tony has brought up to coach football in an entertaining way. When he was at Hibs, he had the best passing side in Scottish football.
He then went down south and had initial success at West Brom before being relegated last season.
The most important thing for Tony in the new season will be trying to get the league championship back.
Celtic supporters enjoy watching good football, but it must be winning football first. It's a two-horse race for the title.
Tony will want to ensure the side is winning games and then, gradually, he can bring in the better football.
People are sitting back thinking there will be a dramatic change at Celtic, but I don't think there will be.
He doesn't have enough money to bring in six or seven players to change everything.
Tony was credited with creating the Celtic huddle, he played well for the club during his time there and the fans will enjoy seeing him and Peter Grant back at the club.
By Frank McAvennie
Former Celtic striker
Tony was a no-nonsense centre half. He learned a lot under Tommy Burns and Burns's philosophy on how the game should be played.
I've seen a lot of his former team, West Brom, and they played some great football. I think the Celtic players will enjoy Tony's outlook because it will be like the reins are off; he'll be wanting them to express themselves.
Celtic were going through a bad time when he created the huddle and it gave the supporters something to cheer about before the games started.
I think he's a great signing for Celtic. And, to have Peter Grant and Neil Lennon there, two fervent Celtic fans, I'm sure they will offer their tuppence-worth.
Celtic haven't been playing great football. I don't think anyone was happy with last season.
No-one can question Gordon Strachan's success - he did deliver three titles in a row - but it wasn't very pleasing on the eye.
It was as though there were restrictions on the players and Tony will remove that. Scott Brown will come into his own as he knew Tony from his time at Hibs.
Tony was never a £2m centre half, but he's a £2m manager. I'm looking forward to the new season now.
Murdo MacLeod and Frank McAvennie were speaking to BBC Scotland's Geoff Webster.
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