Klopp insists it was difficult to prepare for Liverpool's second leg Champions League clash with Atletico as the coronavirus pandemic was taking hold of the Spanish capital.
"It is two weeks ago, but it feels like it is ages ago that we played Atletico and Thursday was a day off," he told Liverpool's official website.
"I remember, we all knew about the situation with coronavirus around the world but we were still 'in our tunnel', if you want, and until then it didn't really arrive into our mind in England.
"We played the Bournemouth game on Saturday, we won it, then Sunday City lost, so the information for us was 'two wins to go'. But then on Monday morning, I woke up and heard about the situation in Madrid, that they would close the schools and universities from Wednesday, so it was really strange to prepare for that game, to be honest.
"I usually don't struggle with things around me, I can build barriers right and left when I prepare for a game, but in that moment it was really difficult."