Newcastle United may need to sell before they buy this summer, which could be bad news for one of Eddie Howe’s most trusted players. The Magpies were unable to strengthen during the January transfer window because of profit and sustainability, and it looks set to be an issue once again this summer. That is why there are so many rumours about Bruno Guimaraes leaving the club, amid his £100million release clause. Obviously, Newcastle want to keep Bruno. However, there are some players who the club could look to move on when the summer transfer window opens. And one of those is a player who the c…