Newcastle United may need to sell players this summer. Indeed, the idea of having to sell before Newcastle can buy again was first raised back in January given the balancing act complying with FFP regulations requires. Obviously, the great hope is that neither Alexander Isak nor Bruno Guimaraes will depart. Isak has stated how happy he is at St James’ Park, while Guimaraes has talked of his desire to continue to his journey on Tyneside. READ MORE: Newcastle confirmed signings, departures, loans & released players in the summer transfer window 2024 The fact Guimaraes has a release clause in his…