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Jurgen Klopp has urged his Liverpool players to be brave in their Europa semi-final - and revealed why he felt so bad the morning after the historic victory over Dortmund.

The Reds boss said that nights like the second leg against Borussia at Anfield happen only 10 times in your life if “you’re really lucky”.

But he now wants his team to go one step further and book themselves a place in the final despite the strong opposition of Villarreal.

“They are a pretty strong team and are fourth in the Spanish league. They are having a wonderful season, they are a wonderful club in a small city. It is clear there are a lot of smart people behind their success.

"We have to play brave football. We are now in the semi-finals. We got there because we deserved it, and now we have to show we are strong enough to go through,” Klopp told Uefa.com ahead of Thursday’s first leg at El Madrigal.

And he spoke of how he had been confused by his own feelings when he woke up the day after the astonishing 4-3 comeback win by his team at a seething Anfield.

That incredible game in pictures:

“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.

“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.”

Asked about his coaching philosophy Klopp stressed the need for his teams to entertain and revealed how he believes Liverpool are actually a possession team despite his image as a pressing advocate.

“I want my team to win – that is it. I want our game to be easy to enjoy, because I think the only real reason for football is to entertain the crowd. If they come twice and say it is boring, then they will think about whether they want to come again. We are a ball possession team, but nobody realises it because my image is pressing and counter-pressing.

“When I was younger, I called it things like ‘heavy metal football’. I have no idea any more why I said that. But I do like the spectacular. When I am in a room with people I try to make sure the atmosphere is not worse when I am there. When I am involved in a game, I try to help ensure it is more enjoyable than when I am not involved.”