The United manager spoke of his frustrations with his team's sub-par performances before the match against Swiss side Young Boys, saying he wanted his players "not to be reactive but proactive".
"I want the team to start strong to have a go immediately and it's a bit frustrating". It is exactly the opposite.
A win will take Jose Mourinho's team into the knockout phase of the competition with a game to spare as long as Valencia do not beat Juventus in Turin.
Midfield has proved a particularly weak link of late, with Saturday's disappointing 0-0 draw at home to Crystal Palace a case in point, and Mourinho - who can not now seem to find a starting place for Fred, his £52m summer signing from Shakhtar Donetsk - is hoping Pogba and company start winning some second balls on Tuesday night. Young Boys is not a crucial game, but I want to play like it is the last chance to qualify.
Mourinho confirmed that Victor Lindelof will be out for a few weeks, as the Swedish defender needs a scan on a muscle injury and could be out until after the festive period.
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"But a team to cope with that happiness to play a decisive game".
United have endured their worst start to a Premier League season in 28 years, with Mourinho's side managing only eight goals in eight domestic games at Old Trafford so far this campaign.
Matteo Darmian, who started against Palace, was also missing from Monday's training, along with Marcos Rojo. Let's forget about Valencia and Juventus. We are not coming from the city center.
As he plans to crank up the pressure on his players to secure a victory against Young Boys, Mourinho was asked if his players prefer to play away rather than at home due to the expectations of United's 75,000-plus supporters at Old Trafford.
"I think it would be a lack of respect to the stadium and the fans to say we prefer playing away", Mourinho said. "The information I have from the club and club contacts with the police is that things are going to be much better than the last time, but if it isn't better I walk". "I never feel pressure at home". "If you feel pressure to play matches at home where the people come to support, come on?"