Ronny Delia wishes to return and celebrate when the inevitable 10-in-a-row comes along.
The previous Hoops boss led the side to two leagues before leaving Parkhead in 2016.
The Norwegian, who now manages Valerenga, speaking to A Celtic State of Mind, said: “I think so. I really hope so, you understand after being so dominant for so many years, Rangers have started to have a better platform to get better and the other clubs will chase you all the time and then you need to have a very good discipline and culture that is about improvement all the time.
“Brendan is the best manager that Celtic can have so I think if he stays until ten then I will really want to come and celebrate ten-in-a-row.”
Deila was full of praise for Tierney and revealed why he switched his position to left back during his term at Celtic.
He added: “In the beginning, he had troubles with his calves, he was always getting cramps. He was a winger in the beginning so I was very clear that for me he was a full back.
“He has to play there because he is so good defensively and so hard to play against but the most important was that he gets his body right and play every week at fullback and then he took steps very quickly.
“He’s one of those players you see is going to reach very far because of his hunger, it was unbelievable.
“On the first day of training with the first team the wingers didn’t want to play against him it was that tough.
“He’s a full back that is very good defensively and has the offensive side as well, that’s why he is much better that a lot of other full backs because he can defend and attack at the same time.
“I’m very happy to see a player like him because he puts so much effort into being the best he can and he’ll get it as well.”