Nemanja Matic reportedly left Manchester United training after just 24 minutes on Wednesday amid doubts over his future at the club.
The Serbia international has fallen down the pecking order under Ole Gunnar Solskjaer, making just three Premier League appearances this term.
Reports have suggested that Matic had attracted interest from both Milan clubs along with Atletico Madrid ahead of the January transfer window.
According to the Daily Mail, Matic trained for just 24 minutes before leaving Carrington on Wednesday afternoon.
The midfielder's future was called into question when Matic recently liked a meme on Instagram linking him with a move to Tottenham Hotspur, now managed by Jose Mourinho.
However, Solskjaer has since insisted that there was no chance that the 31-year-old would be moving to the North London club in January.