The United manager kicked a water bottle carrier and threw another into the ground in celebration at a goal that means they head to Valencia next month with progress assured after the Spaniards lost at Juventus on Tuesday.
“Relief,” Mourinho said of his celebrations. “Frustration before that and relief with the goal.
“I think we didn’t play for that, we didn’t play for 0-0. We didn’t play to be in trouble until the last minute, so frustration.
“I was not unhappy with the players. Not at all.
“Frustrated with the fact that we couldn’t score, yes, but my players were very tired at the end and that’s what I love – I want them to be very tired.
“It means that they give everything, and they did that, with moments of very good football, moments of quality, moments of hypothetical beautiful goals and then also with moments of pressure, moments of lack of confidence, that frustrate us.