It was the first game back with United for Pogba after his World Cup-winning exploits, and he said it was challenge to find his form before eventually giving way to substitute Marouane Fellaini in the 84th minute.
And his next comment has already led to backlash from Manchester United fans on social media after Mourinho said finishing behind City wasn't such a bad thing....
José Mourinho appeared to take aim at Ed Woodward, Manchester United's executive vice-chairman, for not sanctioning all of his transfer targets, with the manager saying maybe his title should be downgraded to "head coach". It's finished, the market is closed and no more talk about it.
It's clear that Mourinho and Pogba don't always have the best relationship but the French midfielder is a huge talent and someone who could play a key part in bringing trophies back to Old Trafford. It was a good match with three good teams, in my opinion.
The season opener will start at 8 pm local time, 12:30 am IST (Saturday) and 7 pm GMT.
"They spent more money than us, so in the Premier League we must get used to teams with players of the same quality that we have", he said.
"It is hard for me to understand, to feel, to believe we finish second - which I keep saying, and it is sometimes hard to believe".
"Nemanja Matic is unavailable, Jesse Lingard doesn't feel he is in a position to help us but Romelu Lukaku can give us a hand from the bench". "He had nine days of pre-season where no training, no football, absolutely nothing".
"Of course, we have second or third choice in case he is not confident or some reason doesn't want to take it but he was ready and of course he trained lots of penalties during the World Cup because it's something in a competition like that every player trains a lot and he was vert confident".
Not a complete display for 90 minutes from Pogba, but plenty for the 25-year-old to build on. I needed more changes, but I couldn't so it was not easy to manage the game from the touchline point of view.
A Shaw giveaway deep in his own area in the 75th minute nearly gifted Leicester the leveller, but De Gea made another spectacular save to stop Demarai Gray's first-time shot from a pinpoint Vardy cross.
Despite missing a host of World Cup stars, City looked in ominous form as it dismissed Chelsea 2-0 to lift the Community Shield last weekend but faces a tough start as Arsenal begins the post-Arsene Wenger era at Emirates stadium on Sunday.