Mainoo's situation has caught the attention of several top European clubs, including Real Madrid and Atletico Madrid, who are aware of his growing frustration with the current situation.
Multiple clubs, mostly from the Premier League, have made contact with Mainoo's agents, with some expressing interest in signing him in the near future.
Chelsea, who were previously keen on Mainoo, have since cooled their interest as they focus on strengthening other areas of the team.
The current uncertainty surrounding Mainoo's future at Manchester United has left his future somewhat uncertain, with questions remaining about whether he will be sold or loaned out.