Manchester United have already conceded 23 times in 13 games in all competitions this term to raise questions about the lack of quality in Mourinho's defence.
'He arrived January, in the first period of the season for him, I don't think is ever an easy situation for a player but this season he had a good start a good pre-season, he started well against Leicester, and then he was injured. "Then after two weeks we lost Dalot, Fellaini, Alexis, we lost McTominay".
The Spain global has been ever-present for United this season, playing in all nine of the club's Premier League games, though he has conceded a total of 16 goals. But some of them wouldn't and kept the players and we didn't even know the dimension and nature of injuries.
The Frenchman added that he does not know if Alexis found it hard to say no to the Old Trafford outfit, but the style of play at the Emirates suited him better.
"I always feel the [next] game is the game [he will score]", he said.
Lukaku has gone eight games without scoring and has only managed four goals in 13 appearances this season.
But asked during Friday's press conference ahead of facing Everton, live on Super Sunday, if United were lining up a shock move for the Swede, Mourinho said: "No".
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Here are three things we learnt from the match.
"Then he came back and was injured again".
'I think I'm in a situation where I need to have a good balance between work and rest, ' Ibrahimovic told Sky Sports last week.
"Because numerous players they belong to these top teams, so we work with what we have we try to improve with what we have".
"One day it will be, he will score and one day his confidence levels will be back to normal, which clearly they are not there".
Ibrahimovic has done well in Major League Soccer, but Mourinho dismissed talk of the veteran returning on loan.