Napoli's manager, Antonio Conte, has been experimenting with different formations this season, including a 4-3-3. This could be an opportunity for Mainoo to play a more central role, similar to that of Andre-Frank Zambo Anguissa, a key player for Napoli who excels at winning possession in advanced areas.

Mainoo's skills as a high-volume dribbler and his ability to time his runs into the box make him a good fit for Napoli's system. He would also have familiar faces in Scott McTominay and Rasmus Hojlund, who have recently joined the club from United.

The two players have already settled in well at Napoli and have been successful on the pitch. McTominay is a key player in the team, while Hojlund has rediscovered his goal-scoring form.

Mainoo's decision to leave United is also influenced by his desire to make the England World Cup squad next summer. With Thomas Tuchel stating that he lacks minutes, Mainoo may be at risk of missing out on a place in the squad if he doesn't get more playing time.

With his current deal set to expire in 2027, it may be wise for United to let Mainoo leave on loan to Napoli, a club that won't compete with United in any meaningful way.