The Swede could not help United to the knockout stages against Basel, as Michael Lang's 89th-minute goal earned Basel all three points.
But after watching his side waste a series of chances in front of goal during the first half of Wednesday's encounter, with the likes of Romelu Lukaku, Anthony Martial and Mauroane Fellaini all coming close for the side, Mourinho was left to reflect on what could have been.
Jose Mourinho speaking after United's defeat to Basel.
The visitors appeared to have done enough to claim the point they needed to wrap up qualification, but Lang decisively struck in the 89th minute, moving them above CSKA Moscow with a better head-to-head record, while United is left with work to do in its final group game against the Russian side.
GETTYJose Mourinho blamed his entire team for the defeat to Basel.
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We lost because in the first half we should be 5-0 up but we could not score one goal after being so dominant. I think the majority of the second half the feeling of everyone was okay, it will be 0-0, but they got the late goal'.
"It is not fair for Blind to blame himself. We have to blame everyone on the pitch because we had so many chances", Mourinho said. He had a very positive game.
The United manager added:"The first half the attitude was good, the football was good, is really diff to blame just football, easy match to win and then you lose, great for them, they have a good chance to qualify".
'The first half was a flawless half without the goals, ' said Mourinho.
Michael Lang's late victor ended United's 100 per cent record in the group stages, meaning United still need to get a point in their final group game against CSKA Moscow.