Alex McLeish has suggested there could be a Celtic exodus led by Vasilas Barkas over the coming windows. 

The former Rangers and Scotland manager, speaking exclusively to Football Insider assistant editor Russell Edge, has admitted both Old Firm sides need to make “quick decisions” if they feel something – or someone – is not working out as expected.

Barkas, who joined Celtic for a fee which could reportedly rise to £5.5million this summer, has struggled for form and has recently been dropped by Neil Lennon in favour of Scott Bain.

The 26-year-old has played 14 times for the Hoops so far but has not played for the last four games across all competitions.

McLeish has admitted that the Greece international’s place is “up in the air” and suggested that Celtic may look to act in the January transfer window to rectify the situation.

Asked how long Celtic could keep faith in Barkas, McLeish told Football Insider: “Well, with the Old Firm, you know they sometimes don’t get the time. If you don’t make quick decisions, if you feel that this is not going to work, then you have to make a really quick decision, and try and do business as quickly as possible.

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“I don’t know where they’re at with the goalkeeper, Barkas, right now but it seems that he’s been under a little bit of pressure, along with a lot of the other players. The question is if he goes, does everybody that’s been in that wee bad spell go?

“Again, the goalkeeping coaches at Celtic, the manager’s own assistants will all be assessing the quality of the incumbents and they have to be realistic and also know it’s difficult to get other goalkeepers, maybe playing at a higher level, from the clubs.

“It’s kind of up in the air, this rumour, but whether they have lost patience with Barkas, I don’t know.”

In other Celtic news, Arsenal have been tipped to step up their pursuit of a Parkhead star after release clause reveal.