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Speaking to Mirror Football via BetMGM, the 50-year-old said: "I've never met Isak in my life, he always looked like a really decent guy on the football pitch, but I think the way he's behaved has been really disrespectful to the football club and knowing what the fans are like up there, you know, I wish him all the best."

He added: "It would be a red flag for me if I was a manager, but you don't know what's been said to the boy.

You might have said the only way you're getting out is by going and kicking up a fuss, and if this is your dream to play for this football club, then you've got to go and maybe be out of character for a while.

"So you don't know what goes on, and I think there's a lot of games with agents in modern day football, and it's just sad.

I mean, I'm sure if Isak went into the football club and said, 'I want to play for Liverpool or my boyhood club or whatever that might be, and I need to leave, I don't want to kick up a fuss, but I will do if you don't help me out here...'

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"I think once someone says that to you, you better off letting them go.

It's just a better way of doing things, and I just think he's been badly advised." Butt is not the only one to criticise Isak's conduct, with several pundits and ex-players insisting he has gone about things the wrong way.

Nicky Butt played for Newcastle United for six years(Image: Getty Images)

Butt also suggested it was disheartening to witness the situation develop as it has following such a triumphant campaign for Newcastle, which saw them secure Champions League qualification and claim their first piece of silverware in 70 years in the form of the Carabao Cup.

And to see the star player behave like he has been, I think it's pretty bad, really.

He can go and he can get the money and go and find players that want to play for that football club, and I think that's the most important thing.

"It's really tough to come back from that, because if you're doing the right things around your peers and within the changing rooms, you can always try and win fans back, if you like.
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