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Former Manchester United forward Wayne Rooney, who once handed in a transfer request in an attempt to force through a move to Manchester City, has slammed Alexander Isak's actions this summer, with the Swede still hoping to join Liverpool.
Up to this point in the window, Newcastle has insisted that Isak won't be going anywhere.
"If I'm a Newcastle player, I don't want Isak back," Rooney said on his new BBC podcast.
"I think if players leave football clubs — and that happens all the time — there's a way to go about it.
"You can't go on strike, can't not turn up for training and train with your teammates.
If you want to leave the club or not, you have to be there for your teammates and be ready if needed.
"For me, I don't think there's any way back for Isak at Newcastle.
And if they're going to do it once, they'll do it again."
For Newcastle to let Isak leave, it would not only have to receive a higher bid than Liverpool's opening $148 million (£110 million) offer, but it would also need to bring in at least one striker as a replacement.
Brentford forward Yoane Wissa is one target, though several others have rejected the chance to move to St James' Park
So it's very disappointing to see his behaviour over the past few days."
Liverpool.com says: Isak essentially going on strike has not been a good look, but the player feels that Newcastle promised him something heading into the summer.
It should all have been sorted out at the start rather than the end of the window, avoiding all of the drama and giving Newcastle proper time to source a replacement.
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