Liverpool boss Jurgen Klopp has admitted that he felt 'completely different' the morning after his side secured a 5-4 aggregate victory over Borussia Dortmund in the Europa League.
The enigmatic German coach led his Liverpool team to a remarkable comeback on home soil as they came from 3-1 down - and 4-2 on aggregate - to secure their place in the semi-finals of the competition.
Klopp, though, despite being pleased that his side managed to progress, has now revealed that he was not in the best shape after dumping his former club out of the tournament.
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The 48-year-old enjoyed seven successful years at the club - he led them to back-to-back Bundesliga titles during his reign - and it's clear for all to see that overcoming them didn't come easy for him.
Speaking to UEFA.com, the Liverpool boss stated: "The morning after the game was completely different because usually after a match like that, you wake up and you think: 'Oh great, what a wonderful thing.' This time I was not in the best shape, to be honest, and I had no real idea why, and then I realised: 'Ah yes, they lost.'
"I had seven wonderful years at Dortmund and I knew how they felt. I knew what they would have done in the hotel and how it would have been when they woke up and all met for breakfast. I knew what the mood would have been like."
Despite feeling sorry for his former club, Klopp has admitted that it was a 'special night' for his side.
He continued by saying: "To be absolutely honest, I was fine with the draw, but when I looked at the clock then I thought: 'Oh, 77 minutes, there's a little bit to go!' I didn't expect it though – you cannot expect a wonder. When we scored again, it was more of a shock than a real joy.
"At the end, when I saw all the happy faces after the game, I knew it was a special night. You cannot have 500 of those. If you are a really lucky guy, you maybe get ten in your life."
Now, though, the Dortmund tie is very much in the past and Liverpool's elite players will be focusing on the next challenge: a semi-final clash against Spanish outfit Villarreal.
After eliminating Manchester United and Dortmund, the Anfield outfit will head into the game as favourites, but Klopp and co. will be well aware that it won't be easy for them over the two-legged tie.
Will Liverpool secure their place in the final of the competition? Have your say below!