Manchester United boss Jose Mourinho has paved the way for departures next month, stating "every player has a price".
Mourinho sanctioned two major sales last January, allowing Memphis Depay to join Lyon and sending Morgan Schneiderlin to Everton, and could be ready to act again.
Henrikh Mkhitaryan appears to be on the most precarious ground, with the Armenian not even making the matchday squad for the past five fixtures, and United continually linked to attacking talent including Arsenal's Mesut Ozil and Atletico Madrid's Antoine Griezmann.
If he continues to play such a peripheral role, United would surely consider offers for a player who cost up to £30 million 18 months ago.