"I didn't see the red card", Mourinho said.
Arsenal boss Arsene Wenger said De Gea was "absolutely outstanding".
"United will be confident going into the game because of what has happened this weekend for City, even though it has been a good week for City too, as they've scored three late winners and have taken maximum points". "But you can not make the mistakes we made at the beginning".
"If it was hard, no; if it was mud, no - the pitch is absolutely attractive but I think they were a bit too much".
"The player with the biggest price tag is more expensive now", he told the Evening Standard.
"I don't know if you've watched many top-level shots, but when you have 33 shots on goal in a game of that stature, it means our dominance was top class". But we have the experience to get better out of a game like that, you know. To be honest, I am not someone who looks at a lot of journalists' stuff, but I am always hearing the same stuff.
The loss was largely self-inflicted as mistakes from Laurent Koscielny and Shkodran Mustafi proved costly in the opening 11 minutes before David De Gea made a series of fine saves to frustrate the hosts. And we put ourselves in a very hard position.
Former Yemen rebel ally Saleh calls for talks with Saudi Arabia
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The Spaniard was the overwhelming victor of the club's Man of the Match award by fans on Twitter after making 14 saves - the joint highest total in a Premier League game since Opta recorded that data in 2003/04 - to keep the Gunners at bay.
A straight red card shown to Pogba for a studs-up challenge on Hector Bellerin will see the France midfielder miss next Sunday's Manchester derby, plus the Premier League fixtures with Bournemouth and West Brom.
'Jose Mourinho will get that out of him'.
"We probably defended better after Paul was sent off", he said.
"We are second and are chasing the top of the table".
Twitter reacts as Manchester United manage to steal away three points from the more dominant Arsenal, who will be kicking themselves after not being able to capitalise on some serious pressure from start to finish. You need the keeper to be there for you when the team needs.
"I felt that at the back our concentration was not sharp enough from the start and not dominant enough".