"Yes we have to do it in the training sessions and in the matches", he said.
'I'm not saying we are going to have more points than last season because last season we collected a very acceptable level of points. Asked whether this was down to the Lindelöf-Smalling partnership, Mourinho said: "No, I think the team as a team is resolving the defensive problems better than before".
You look an Fellaini, as unattractive he is as a footballer, he is effective, he works for that United team and maybe having that different style of player in that team is working. He's never suffered back-to-back home league defeats in his managerial career but to counter that with a bit of negativity, United have lost three of their last five Premier League ties immediately following a Champions League match.
Manchester United are odds-on to win their fourth game in-a-row but can they get the better of a side that has conceded just once in their last four?
"I think we're improving as a team. Maybe the young United full backs can emulate the two terrific full backs from Liverpool - Robertson and Alexander-Arnold". All of them, they can say the same thing.
The Red Devils are coming off of a win at Watford in the Premier League and a win away to Young Boys in the Champions League.
"I think it is [a mental thing]", he said. Because Martial play 90 minutes [against Young Boys] and Sanchez played zero'.
'Every player has another level to step up, ' said the manager.
You'd have to wonder, then, what the thinking is at Manchester City this week after losing to Lyon on Wednesday night.
Jose Mourinho has been speaking to the media at his pre-match press conference today and he's provided a team news and injury update ahead of the game.
"I think the happiness, the confidence, the self-esteem was what pushed him to play the first match nearly without training against Leicester and played a very good match".
'I am optimistic, but a hard season, yes.' Mourinho admitted that the mood can change quickly in football, adding: 'I think good results and good performances make miracles.
The manager was disappointed not to recruit a senior player in the position during the summer window as he believed this was required to bolster his rearguard.
"It's more about the moment and the momentum is very important in the positive and negative way".