But the youngsters were quickly caught up in controversy after flouting the strict bio bubble in Reykjavik, leading to the pair being sent home, public admonishment from Gareth Southgate and a Football Association investigation.

United also publicly rebuked Greenwood for his behaviour on a trip that Solskjaer does not believe he should ever have been on, stressing that people “have to understand he’s an 18-year-old kid who needs managing”.

“Yeah, of course I speak to Mason and I’ve spoken to Mason,” Solskjaer said. “Of course what we speak about and discuss will be between the two of us. The kid had a fantastic season. He’s just come through.

“I’ve worked and the club have worked and all the staff here worked really hard.

“We gave Mason enough time on the pitch, we gave him exposure in the media. Then you come to the end of the season and we’ve had less than two weeks off and he’s called up to the national team.

“I have to be honest enough to say I tried my best to give him a rest over the summer. That the club we asked specifically and pointed out that he should have had a rest.

“He needs it mentally and physically after that season he had. First thing that happens is 1) he’s called up, and 2) he’s right there in the press.

“We’ve done whatever we can to protect him and I will keep on helping him. I know that when he comes back into the daily routine of the club and what we do to him, he’ll be fine.”

Greenwood had to train on his own when returning to United due to coronavirus measures, but Solskjaer confirmed the teenager can line-up against Crystal Palace on Saturday.

Harry Maguire is set to lead the side out at an empty Old Trafford after finding himself in the eye of another storm.

The defender was handed a suspended 21-month sentence after being found guilty of assaulting a police officer, swearing, resisting arrest and bribery during an incident in Mykonos.

Maguire denies the offences and has launched an appeal with the Greek courts, but there is no sign when the case will be heard.

“The process will keep on going,” Solskjaer said. “Knowing Harry, he’s a very strong character so hopefully he can put that apart.

“But, naturally, as a human being it will be in the back of his mind what’s happened this summer, and apart from that you’ve just got to see how it develops with Harry.

“Personally, I think he will be able to focus on his football but then again who am I to … you can’t predict how people will react.

“But so far he’s trained well, he’s been focused, so hopefully that process will just go on and, of course, we know it’s something that will go on in the legal department over there.”

Maguire will relish the return to football, as will Donny van de Beek as the summer signing prepares to make his United debut.

Paul Pogba is available after a positive Covid-19 test and Luke Shaw has overcome an ankle injury, but Solskjaer gave little away about his number one with David De Gea facing new competition from Dean Henderson.

“I can’t, I’m not going tell you the team today” he said.

“But the goalkeeper training has been fantastic to watch. It’s so enjoyable, it’s the highest possible quality you can imagine.

“I know the goalkeeper coaches are really enjoying working with them. Some of the stuff is fantastic and it’s going to be an interesting, interesting thing for many to follow.

“They are working well together at the moment. Sergio (Romero) has not come back yet, he was given some extra time with his family.”