The Red Devils drew 1-1 with Anderlecht in the first leg of their Europa League quarter-final.
Henrikh Mkhitaryan opened the scoring for the visitors on 36 minutes but they failed to hold onto their lead as Leander Dendoncker scored late on for the Belgian outfit.
Jose Mourinho was critical of his side for failing to take their chances, although he was pleased with his defence.
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Lingard and Rashford, they did defensively what we asked them to do; they covered some space but when the team is broken on the counter-attack, we cannot lose so many balls.
And he singled out two attacking players who carried out their defensive duties perfectly on the night.
“It was a strong performance from the team, the defensive part,” Mourinho said.
“Lingard and Rashford, they did defensively what we asked them to do; they covered some space but when the team is broken on the counter-attack, we cannot lose so many balls.
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“We didn’t miss so many chances; it was about half-chances and chances where the space is there and the time is there but these moments, sometimes we play two-touch not one-touch and lose the ball.
“Another time one-touch not two-touch. The decisions were wrong.”
United welcome Anderlecht for the return leg on Thursday (8.05pm).