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Like Isak, the Manchester United legend once found himself at the centre of his fanbase's fury - leading to a frightening situation involving multiple men in balaclavas.
Back in 2010, Rooney told United he wanted to leave, having grown disillusioned with the club's direction.
Whispers of moves to both Manchester City and Chelsea were rife, and the uncertainty surrounding his future was badly affecting his form, having scored just one Premier League goal by New Year's Day.
Such was the outrage in United circles that several angry supporters turned up outside Rooney's house in the middle of the night in an apparent attempt to intimidate him.
For Isak, though, a similar resolution feels far less likely.
Wayne Rooney told Manchester United that he wanted to leave the club in 2010(Image: AFP/Getty Images)
The 25-year-old Swede looks to have burned bridges at Newcastle by refusing to play as he pushes for a blockbuster move to Liverpool.
"It is very difficult for him to stay at Newcastle - I have seen a lot of things with the club's fans saying he has gone about it the wrong way.
Rooney knows all too well the sort of backlash Isak is facing(Image: BBC)
"You don't know what they are saying at board level but you imagine they would want him to stay, because for Newcastle to lose Isak when they are trying to build and try and form a squad to challenge for the league - it is a big loss for them.
"The difference now, with all the financial fair play and PSR, for Newcastle, it might benefit them to sell him to free up money, bring more players in and actually make the squad a little bit stronger.
"For Isak as well, it is an opportunity to join Liverpool, who have just won the Premier League.
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