Manchester United manager Ole Gunnar Solskjaer insist the club can't have any sulkers in the squad after Donny van de Beek's frustration on the bench.
The Dutchman was quite frustrated after netting getting minutes in United's win over Villarreal in the UEFA Champions League on Wednesday night.
"I manage a squad full of international footballers, competitive footballers who want to make a difference, want to play. They all want to be on the pitch, of course they do," Solskjaer told reporters, as per Sky Sports..
"Donny was ready to come on, as all the players should be. I've probably been a substitute more than anyone in this club and you have to be ready all the time.
"I've not been very happy a few times, but that's just a decision the manager makes. Alex (Telles) was coming off as a left-back and Fred did that job well, so I understand the frustration.
"Every player is keen to play. That's got to be built into energy and some determination for when you get on and then show me. That is not just Donny, that is all the players."
Solskjaer added that Van de Beek has never distracted the team with his frustration.
"If we're going to be successful together, we know that we need a positive energy," he added.
"We can't have any sulkers, but Donny has never affected his team-mates negatively.
"As soon as I see players affecting the team negatively that's a different scenario and I'll probably be a little bit firmer."
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