Graham Potter sends Manchester United message on Mason Mount with Chelsea reminder | OneFootball

Potter was full of praise for Mount as he described midfielder as “a pleasure to work with”

But he came on as a substitute during Thursday night's European showdown with Athletic Bilbao and swung the game in United's favour with two spectacular goals.

"A pleasure to work with, I have to say. Really, really, really good guy who gave his best every day," said the Hammers boss.

"Fantastic quality. His goals the other night is what Mason is, what he's about. He's got that capacity to do that. He did that in the Champions League for Chelsea against AC Milan.

"So, I know his quality. He's probably had a tough few years, I would say, because of the situation with Chelsea and then going to a new club and maybe injuries.

"But the quality of the person is at the highest level and the quality of the player is also at the highest level.

"From my perspective I hope, as much as I like Mason, that it's another week before he gets back to where he can be.

"I have nothing but respect for Mason as a person and as a player. He was going through a tough time with Chelsea and I'm sure he's had a tough time since.

"But I know the character, I know the person, it'll only make him stronger."

Full-back Aaron Wan-Bissaka joined West Ham from Old Trafford last summer and heads back to his old club as a contender for the Hammers' player of the year award.

"I've been really impressed with him. I'm not sure he's played at as high a level as he's playing at the moment," added Potter.

"I think he's in as good a form as he's ever been. He's pushing himself. He's been a real bonus.

"I think he's not at the absolute maximum as well. He can still improve, he can still get better. So that's exciting for him and for us."