Manchester United midfielder Nemanja Matic has confirmed skipper Harry Maguire that he fined him for using his phone inside the club.

The Serbian caught Maguire handling his phone in the gym — something which is forbidden.

An awkward conversation ensued, as Matic told manutd.com.

“He was fined, yeah," said Matic.

“He brought his phone to the gym. The problem was [that] me and him, we decide what are the fines! A few days later, he brought the phone to the gym, so I said, 'Harry, I'm sorry…'

“It's very important, discipline, in our team, so that's why we made some basic rules," he continued.

“Not to be late for training, not to be late for meetings, no phones in the gym. The guys struggled to adapt for a few months, so we had a lot of money in our account, but it's going to be better!"

Matic is such a stickler for the rules that he even recently took the unconventional step of fining himself — though he expects one fellow team-mate to cough up half of the penalty fee.

“I have to say, just before the Newcastle game, I fined myself," he laughed. “I was late for a meeting by two seconds, and the rules are the same for everyone. I had to fine myself, because they catch me!

“I was late to the meeting. In front of the room [where the meeting was taking place] I was talking to Paul [Pogba], so I will ask him to pay 50 per cent of my fine. I don't know if he will accept!"