Manchester United manager Ruben Amorim has reportedly introduced a strict new rule in the dressing room as he stamps his authority on the squad.
The Red Devils have had a mixed bag of results since Amorim took over last month, although they have only suffered two losses during his tenure.
Read: Man Utd 'Reach' Agreement For Amorim's First Signing
The Portuguese tactician has already implanted his authority on the squad after ESPN reported that the he has banned food in the dressing room on matchdays.
Amorim has also been clear about unnecessary breaks after Marcus Rashford and Casemiro were criticised by pundits and the media for flying to United States during the last international break.
The Red Devils got back to winning ways on Thursday evening after defeating Viktoria Plzen, but Rasmus Hojlund and Amad Diallo got into an argument after the game, something which didn't upset Amorim.
"For me, it's perfect. We need to feel something. If we need to fight each other, it's like a family," Amorim said, as per Goal.
"For me, it's a very, very good sign. We need to feel something and that is important."
The Red Devils will be back in action on Sunday when they take on cross-town rivals Manchester City at the Etihad Stadium.