Goals from Marouane Fellaini, Romelu Lukaku and Marcus Rashford handed United a Champions League win at the first time of trying this campaign. We are playing only with two midfielders, with Matric and Pogba, which are playing really well and without reason to change.
He added: "I didn't speak yet with him or the medical department but the squad is for injuries, the squad is for suspensions".
"We stopped to play, we stopped to think, we stopped to play seriously, we stopped to make the right decisions on the pitch". After leaving the field in the first 20 minutes, the FC crew assess the implications for Man United without Paul Pogba. I just know from experience it's a muscular injury. He told MUTV: "I don't know".
"In my experience, muscular injuries stop you from playing for a few weeks, I think".
Having spent last season picking a path to glory in the Europa League, which enabled them to qualify for the Champions League, this was United's first game in the top continental competition since December 2015. Today we went back to two again and I had on the bench Carrick and Fellaini, which were also important players in the last season.
United's next match will be against Everton this Sunday at Old Trafford.
After all, "that's what squads are for", as Mourinho said.
"I saw a team that was alive, that was suffering and fighting together until the 90th minute".
The extent of Pogba's injury is unknown, but Mourinho believes he will be without his superstar midfielder for only a few weeks.
The Old Trafford side has a busy September ahead of them as face the likes of Everton, Burton Albion, Southampton, CSKA Moscow and Crystal Palace.
De Gea said that it was tough for United's players to watch the Champions League last season, with the club not involved.
"So we need this and in the Premier League and the Champions League I have to choose the players in relation to the quality".