A summer of discontent at Old Trafford appeared to come to a head on Thursday as the transfer window ended without the reinforcements their manager had so publicly declared a priority.
With only 24 hours to go until Man Utd kick-off their campaign at home to Leicester, Mourinho is not a happy manager.
In the two games last season, United picked up four points, winning 2-0 at Old Trafford but settling for a draw at King Power Stadium.
"That's football management. I think football is changing".
"Yeah I think it has been a long time since we won the league and it would mean more than ever to win that", he explained.
"Pogba was a monster, we thought maximum 60 minutes, he managed (more than) 80", Mourinho said after taking his captain off late in the game.
"I focus on just what we have, and we go with everything we have to the first match".
"Will his style of play bring us an EPL (English Premier League) title?"
"He worked amazingly well Monday, Tuesday, Wednesday and he's one of the players that I have to speak to see how physically and mentally he feels".
Victory in the Premier League opener was a much-needed shot in the arm after weeks of doom and gloom, with summer target Harry Maguire's inclusion in the Foxes' line-up serving as a reminder of what they missed. Forget the name, forget the history, forget the shirts, every team is a good team and every match is hard'.
Just 26 days after lifting the World Cup with France, the 25-year-old scored an early penalty and dominated the midfield before being replaced after 84 minutes. "Marcus Rashford was in trouble but he played", said Mourinho.
"Paul was fantastic, his contribution was incredible but the fuel was disappearing". Paul [Pogba] was fantastic - his contribution was unbelievable, but the fuel was disappearing every minute, so we were in trouble and we needed [Scott] McTominay and [Marouane] Fellaini to give me that balance in midfield. "In the second half I had Andreas Pereira and Fred with a yellow card, Paul was fantastic his contribution was wonderful, but the fuel was disappearing".