Jose Mourinho has hit out at the 'specialists'
United have put themselves on the cusp of qualifying for the knockout stages of the competition after a 2-0 victory at home to their Portuguese opponents means they top Group A with maximum points.
An own goal and a late penalty from Daley Blind was enough to secure the win.
Mourinho has come under scrutiny over the past few weeks for the way he has set up his sides against the big boys, in particular away to Liverpool where they managed a goalless draw and provided little attacking threat.
Lukaku has bore some of the brunt for the fans after going five matches in all competitions without finding the target.
Manchester United player ratings against Benfica
Tue, October 31, 2017
Express Sport brings you Manchester United's player ratings from their win over Benfica
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1 of 11
David De Gea – 7.5
We have not qualified yet? Four victories and it is still not enough? We must get that point from the two remaining matches
And Mourinho was in feisty mood when asked for his thoughts on the game.
He said: “We have not qualified yet? Four victories and it is still not enough? We must get that point from the two remaining matches.
"It is better for the specialists to comment on the game than for me to give my opinion. I am paid to do my work, which I do, and the specialists comment. Let them do that.
Daley Blind wrapped up the game with a spot kick
"I am more than happy. We changed a lot of players, we broke the natural dynamic and routines of the team and we played a kid (Scott McTominay) from the academy.
“We scored two goals, did not concede, gained three more points, more money for the club because every victory means money and did not have any significant injuries."
United travel to face Chelsea next on Sunday (4.30pm).