The prospect of losing key players has been something Newcastle United have had to deal with of late. While it wasn’t really an issue for Newcastle to consider in the initial wake of the PIF takeover, things have changed since. Kieran Trippier, after all, was linked with a move away during the January transfer window. Bruno Guimaraes, meanwhile, continues to be touted for a potential exit at the end of the season. Off the pitch, Dan Ashworth opted to join Manchester United, albeit that move is yet to be ratified. Then there’s Joelinton. While there were recently claims a pay rise was coming fo…