The Portuguese returned to Old Trafford in his position as Tottenham boss and was less than impressed with what he saw upon his arrival
The Portuguese was relieved of his duties by the Red Devils in December 2018.
He had spent two-and-a-half years at the helm by that point, but was unable to build on the success he enjoyed during a productive debut campaign which delivered three pieces of silverware.
Mourinho had done all he could to rekindle former glories for United, with every avenue explored in a bid to give the Red Devils a competitive edge.
One of the decisions made in that process came back to haunt him 12 months after his departure.
On December 4, 2019, Spurs took in a trip to Old Trafford with Mourinho calling the shots after being appointed as successor to Mauricio Pochettino.
They would suffer a 2-1 defeat, with current United boss Solskjaer claiming that his predecessor was not happy with the facilities at the Theatre of Dreams.
The Norwegian told United We Stand of a meeting with Mourinho: “We had a chat before the game.
“I’d not really met him before, only briefly when he was at Chelsea and they played Cardiff. We had a nice chat. He was complaining about the away dressing room, the one that he’d changed!
“There was a positive atmosphere between us – it was good to have him back.”