Even by settling for a 0-0 draw in the first leg in Spain three weeks ago, Mourinho signalled that he is a coach who has failed to evolve with the modern game.
Jose Mourinho turned to Pogba to influence the game at a crucial stage but the France global was arguably United's worst performer and he gave the ball away a number of times in good areas.
But did anyone impress for United against Sevilla? Hopefully, I can get some game time and I am still enjoying training.
During his spells with Porto, Chelsea, Inter and Real Madrid, Mourinho has developed a reputation as the master of stifling the opposition before striking at the most opportune moment, but the tables were turned in dramatic fashion here.
The Seagulls sit seven points clear of the bottom three
"(This was) an historic night of pure magic, we played a team decorated with big-money signings and superstars and we were better", said proud Sevilla president Jose Castro. Mourinho's decision to start the Belgium midfielder was perhaps understandable on the basis that the United manager needed somebody to nullify the threat of Sevilla's own towering midfielder, Steven N'Zonzi. "This is football and we have to accept that".
The 2-1 win by Vincenzo Montella's side, who are in fifth place in La Liga and struggling to qualify for next year's competition, cuts United's European campaign short but they only had themselves to blame. And after replacing the ineffective Muriel, he scored two goals with his first two touches at Old Trafford.
United continued to be sloppy on the ball, Pogba curling a 72nd-minute effort narrowly wide, but it was a Sevilla substitute who came up with the opener. The United manager attempted to retrieve the situation by throwing on Anthony Martial and Mata, but it was too little, too late.
Manchester United captain Michael Carrick has announced he will hang up his boots at the end of the current campaign after 12 trophy-laden seasons at Old Trafford.
"But I believed in myself, believed in the team and we showed we are a great team".