Here, we take a closer look at three United players the bookies are pricing-up for a Newcastle transfer:
Having been cast aside by Ole Gunnar Solskjaer at the start of last season, the academy graduate headed to West Ham on loan and rejuvenated his career with nine goals - and five assists - in 16 appearances as the Hammers went on to claim a Europa League place.
His days at United appeared to be numbered when Cristiano Ronaldo sealed a sensational return to the club, from Juventus, on deadline day.
Not a chance, surely? Speculation over Pogba is never too far away - though if he is to depart Old Trafford midway through the season then it will, almost certainly, be to PSG, Real Madrid or one of the other big hitters in Europe.