Johnson had bought a special 450 pounds ($601) bottle of wine that he wanted to share with Mourinho after the match - but instead champagne was the order of the night.
Bristol will face Manchester City in the two-legged semi-final. "I think they showed they had that after the 1-0 and they had that until they scored the second goal in the last few seconds and we had no chance to react".
They then play host to Burnley on Boxing Day before wrapping up 2017 with a visit from Southampton.
"But they played brilliantly, fought like this was the game of their lives, which it probably was, and I think a attractive day for football, because a team from a lower division won". We lacked the intensity that they had.
"My dad always says he was the most successful Bristol City manager so maybe I've pushed him a little bit close with that result".
"I thought at times tonight we looked like the Premier League side", Johnson told Sky TV cameras. You expect to see big teams in the semi-finals of cup competitions, even though clubs change their sides up. They won in our best moment of the match when everyone was waiting for our goal. But I don't want to blame the players at all because I think they were professional - it wasn't a case of "we don't care about the game" or "we don't have responsibility" or "we don't have pride'". But again, I don't want me saying they're lucky to be the main thing. They tried to win the game in the 90 minutes, which they could, and they were very, very lucky to have the goal in the last second. The most important thing is that a Championship team beat a club like Man Utd. "We know how to lose and win and we say congratulations and wish them well in the semi-finals".
"It's not good at all, but we need to move on and accept it as a part of football and keep moving".