"I think it's a bad injury", Mourinho said.
"The way he was playing during the time he was on the pitch, he showed the intensity that is only possible when you are fit".
"He was pressing really high, we start the match not giving one inch to (Ever) Banega, pressing him really high".
"The only moment we felt relieved was at the end of the first half, where by a couple of mistakes in possession they had a couple of good situations that gave this fantastic stadium the emotion they normally have for 90 minutes".
Chances for both Joaquin Correa and Luis Muriel fell to the home side, but David de Gea's fine form saw Mourinho thanking the Spanish worldwide.More news: Wendy Williams takes break from talk show to rest
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" Paul Pogba made a big effort to try and give the team what I had asked him for".
Pogba has come in for criticism from Mourinho for his recent performances, with the arrival of Alexis Sanchez in the January transfer window raising doubts as to whether the two can play together in the same team.
The reigning champions head to Old Trafford on Sunday on the back of a good display against Barcelona in the Champions League, which ended with a tinge of disappointment as Lionel Messi cancelled out Willian's opener.
Mourinho's men were on the back-foot on many occasions in Sevilla, but thanks to some solid organisation and the goalkeeping brilliance of De Gea, they look in a very strong position heading back to Manchester. "I know that is hard, I know that Sevilla has experience and quality but it's a match at Old Trafford to decide the result".
"He's thrown the Huddersfield thing in again which seems to me as if he's saying "he made himself unavailable because he was supposedly ill" and the way he's phrasing it he's saying "and I don't believe him".
The Serie A team appeared to be coasting in the round-of-16 first-leg tie when Cengiz Under put it ahead with his fifth goal in four games four minutes before halftime.