The Champions League victor, a former midfielder famed for his endless energy, won four league titles at United and was the first Asian player to captain the club and play in a Champions League final.
Sensation of the day came at Selhurst Park where Crystal Palace, hitherto without a goal and point to their name, downed champions Chelsea 2-1 with Wilfried Zaha, returning from injury, scoring a fine victor just before the break.
"I never saw a celebration like this for 1-0 after 60 minutes - I thought it was a Golden Goal in a World Cup final!" Chelsea could not stop them a fortnight ago, so what chance did Stoke City have?
The game was buzzing with excitement and entertainment, but Man City stretched their lead again after a brilliant cross from Kevin De Bruyne was met by Jesus, who finished clinically to extend his team's lead. We will have that again in November but after that again I'm sure it will be fine. "I am very happy and very proud of it".
De Gea stuck out his left boot to turn away Joel Matip's effort from point-blank range in one of the rare sightings of goal.
"In the moment when I think we cannot be successful, and there is the only consolation, I go", Klopp said, "Why should I be here as some kind of caretaker until the world creates a manager who can be more successful?"
Yes, United have dropped two points behind Man City in the table, but, as Mourinho said after the game, the Premier League campaign is a marathon.
Liverpool boss, Jürgen Klopp did bring in four new faces; Mohamed Salah, Andrew Robertson, Alex Oxlade-Chamberlain, and Dominic Solanke and has also agreed a deal to bring RB Leipzig midfielder Naby Keita next season. "One thing is an entertaining game for fans, another thing is an entertaining game for people who read football in a different way". And I feel already much more responsible than maybe I should.
The match was was only the second time United has dropped points this season.