The 20-time English champions will then take on Tottenham Hotspur on August 27, before fixtures against Burnley, Watford, Wolverhampton Wanderers, West Ham United and Newcastle United.
The manager, however, celebrated on the touchline after Luke Shaw directed home his first senior goal to put the result out of reach after an excellent through ball from Juan Mata.
Pogba's third-minute spot-kick settled the hosts' nerves as United allayed some of the doom and gloom predicted by Mourinho after failing to land a series of targets before Thursday's transfer deadline. The Portuguese manager was pointedly critical of his star player following the World Cup, essentially challenging him to replicate his World Cup form at the club level. "I just try to help the team as much as possible, like they helped me, too".
"I find myself in the beginning of the Premier League with the market closed in the situation I thought I was not going to be in", he told Sky Sports. That [the World Cup] is in the past, it is part of history.
"Like I said, when you are comfortable, when people trust with everyone or confident, are good in the head, it's going to be easier". I need more changes.
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I can play full back and on the wing, but I have very much been at left back over the last five or six years. Opening the scoring within a matter of minutes, Mateusz Klich's early effort was wonderful.
"For us, it will be a hard season because I had my plans, and I had my plans for many months, and I started the Premier League season without a situation I thought was possible". I came from the academy, I played for the first team.
The message was in the aftermath of the transfer news about his suspected move to Barcelona.
United were linked with several new players in various positions across the pitch during the close-season, but in the end only Fred, Diogo Dalot and Lee Grant arrived. For me, it was a dream come true. Even tonight, I know I can be better and that is what I want to keep showing the manager.
"I chose to take it, I was one of the names and in the next game, I can leave it for Alexis next time, it's not a problem".
Everyone involved at Man United will be trying their best to avoid having a transfer window like that ever again. It's the last time I speak about it. You have to give him a platform.