Newcastle United are very serious when it comes to keeping their best players this summer. The only way Bruno Guimaraes is going to leave is if someone activates his £100million release clause, despite some people at Arsenal thinking they might be able to sign him for less than that later in the summer. Anthony Gordon is also going absolutely nowhere, despite being tentatively linked with a move back to Merseyside to sign for Arne Slot’s Liverpool. Newcastle United do not want to sell either of them, and their stance is the same when it comes to Alexander Isak. READ MORE: Who is Alexander Isak…