It is widely known that Napoli have been keeping tabs on United midfielder Mainoo as speculation grows over a January swoop which would allow the England international more time on the pitch under manager Antonio Conte.
The 20-year-old has dropped down the pecking order under manager Ruben Amorim over the past year and reports state that he has grown tired of the bench whilst many players leave the side and thrive elsewhere.
Former Arsenal star Stefan Schwarz has spoken on Mainoo’s future this week, which he says belongs in North London where he could reach his full potential.
"Declan Rice is a very good player. I like him a lot. He's a good leader. He can play in different positions, he's versatile and so solid. You know what you get from him every week. His delivery is unbelievable, and he has a great work rate and ethic.
“He is one of the leaders at Arsenal. He rarely gets injured, and he's a good character. He looks out for and takes care of his team-mates. He is also very good when talking to the media, which is very important and is an understated skill.
“He’s so important to Arsenal. If he was to get injured it would be a huge setback, they could cope in the short term thanks to the size of the squad but losing him for a couple of games wouldn't be a problem."
Chelsea have previously expressed an interest in Mainoo but Napoli are said to be the frontrunners after they have found success in former United stars Rasmus Hojlund and Scott McTominay.
Arsenal have pushed many young stars such as Miles Lewis-Skelly and Ethan Nwaneri into the first team and Mainoo could be the next player to make his name with the side who already have a plethora of talent.