Newcastle United may need to sell players before they can buy this summer. Indeed, it was a prospect first raised back in January amid FFP restrictions at Newcastle, albeit there is reportedly hope of a big rebuild. Eddie Howe was warned that selling either of Alexander Isak or Bruno Guimaraes would set the club back amid their links with a move away, while the linked-away Kieran Trippier has now suggested he will be staying. Miguel Almiron is also thought to want continue his career at St James’ Park, meaning the club may need to sell other players in an effort to raise funds. READ MORE: Newc…