Joe Hart has been hailed as a £1m 'bargain' for Celtic.
The 36-year-old yesterday announced that he will call time on his career at the end of the season.
The ex-England No.1 will end his time between the sticks after three years in Glasgow at the end of the campaign.
He joined as one of Ange Postecoglou's first signings in the summer of 2021 from Tottenham Hotspur.
And Celts great Pat Bonner reckons replacing him will be a very difficult task.
He told the Scottish Sun: “It’s good that Joe has ended any uncertainty over his future.
“He’s a top professional and now wants to do all he can to make sure his final season here is another successful one with Celtic.
“Joe came to Scotland and settled a situation at the club that was very precarious.
“They brought in a keeper, Vasilis Barkas, who had cost big money, and it hadn’t worked out.
“Celtic needed someone in that position who could provide stability, and Hart’s done that very well over his period here. He’s excelled at making big saves at the right time.
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“I’ve a lot of time for him. He’s been great value for what he cost. For his level of experience, in the Premier League and Serie A and for England, a fee of £1m was a bargain.
“He will be one of the leaders in the Celtic dressing room along with Callum McGregor — and for that reason he’ll also be a big miss.
“I like the way Hart conducts himself and the way he speaks. On and off the pitch he’s been a leader in every respect.
“Joe’s been a great role model at Celtic — works hard, does all the right things. I’m sure he’ll want his final months at the club to be as successful as possible.
“Now Celtic have to find a replacement — and how do you fill such big boots?
“I’m not sure there’s anybody coming through the system. I’m not convinced by the current back-ups.
“Celtic are going to have to go out and buy somebody, and it sure won’t be easy to find a candidate of Hart’s calibre.”
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