It is imperative that Celtic tie manager Ange Postecoglou down to a new deal immediately, says former Scotland boss turned Sky Sports pundit Alex McLeish.

The Lowdown: Postecoglou works his magic

The Australian enjoyed a fantastic first season in charge at Parkhead, guiding his side to both Scottish Premiership and Scottish League Cup triumphs.

Postecoglou has become an instant hero at Celtic, carrying himself with class, but it is worth remembering that he only signed a one-year deal at the club.

That means his future remains up in the air, with a new contract not yet signed.

The Latest: New deal vital

The Glasgow Times have however reported that contract talks are underway behind the scenes, and giving his reaction to Football Insider, McLeish urged Celtic to sort Postecoglou's future as soon as possible:

"Given what he’s done in the season just gone by, he obviously deserves it. What are we saying, it’s a flash in the pan? He acted very quickly under absolute massive pressure and set about (with his job).

"To be fair, the Celtic board helped him in backing him for all these players he knew that came into the club. There was a wee stutter at the beginning but you know what he did after that. That is great credit to him.

"That brings suitors to the table. That’s why I think Celtic would be very wise to tie him up."

The Verdict: Surely it happens?

Postecoglou is on a rolling deal at the moment but Celtic simply have to agree a long-term deal with him, ensuring he remains manager for the foreseeable future.

He has already made such a positive impact at Parkhead, winning two trophies and guiding the Hoops back into the Champions League, and he could potentially oversee a glorious period in the club's history.

Losing him after one year doesn't bear thinking about and it still feels likely that Postecoglou's future will be sorted sooner rather than later.

In other news, a pundit has dropped a Celtic exit claim. Read more here.