A defensive Atletico rode their luck in large parts at Anfield, but came from 2-0 down to win 3-2, progressing to the quarter-final 4-2 on aggregate, with Adrian at fault for at least one of their goals.
Klopp seemed dumbfounded by the result after the game, questioning Atletico’s playing style, but still insisted he was happy with Liverpool’s performance, with the Reds registering 35 shots on goal.
“We saw all the goals we conceded, we shouldn’t concede these kind of goals,” he told BT Sport. “Tonight, it is difficult to explain these goals, but it is like it is.
“I don’t understand with the quality they have the football they play. They could play proper football but they stand deep and have counter-attacks.
“I realise I am a really bad loser, especially when the boys put such an effort in against world-class players on the other side who defend with two rows of four. It doesn’t feel right tonight, to be honest.”
He then said in his post-match press conference: “I am a really under-average loser, to be honest, at least tonight. I could say a lot of things and I would look like the worst loser in the world. The way they play I just don’t get it. But the winner is right. That is how it is.”
Referring to Adrian’s miscued kick to Joao Felix, who then fed Marcos Llorente to score to make it 2-1 on the night, Klopp said: “We score the second goal and then everyone sees their first goal. The pass was not really helpful.