Judging by the statements of the Liverpool management, they are capable of doing this. But now I am tense about the fact that Isak is following the path of Gyokeris, starting to exert unhealthy (by sabotage) pressure on the club. I really don't like this trend - a contract is a contract, if you signed it, then fulfill it to the end or pay a penalty for breaking it. If Liverpool doesn't want to pay 130-150 million (as Newcastle wants) then let Isak wait until the end of the contract.
Sporting and Newcastle both aren't satisfied with this situation for sure. But I think we should understand the players' future plans as well. They didn't want to waste their time in a smaller team for longer.
Gyökeres is 27 and Isak is 25 now. They are both in their most productive age range. It is better for them to show their skills to the world at bigger teams playing in the most prestigious leagues.

Well, what difference does it make what they want if they signed a contract? It was a voluntary deal and when it stopped being beneficial to them, they try to break it. I really don't like this trend. In addition, those big clubs that lure players but don't want to pay the full price for them also cause irritation, it looks a lot like fraud. I think there is no point in arguing about the moral side of the issue - it is immoral.