Liverpool manager Juergen Klopp said the 4-0 win over Barcelona on Tuesday was "unbelievable" and paid tribute to the belief his players had shown to secure the shock 4-3 aggregate win and a place in the Champions League final. The German was clearly swept up in the emotion at the end of the game as a delirious Anfield crowd sang the club's anthem "You'll never walk alone" with the players lined up in front of the Kop. "When I saw the boys after the game and saw the tears in their eyes, that's football and they are professionals and it's still like this," said Klopp. "This club touches you like crazy, it's like you feel much more than others in these moments. It's really great, I love it. "It's a special night, very special. Winning against Barcelona is obviously one of the most difficult things in the world of football. Winning against Barcelona when you are actually 3-0 down makes it not easier. "We had to score four goals and (were) not allowed to concede. That made it, again, more difficult. So we didn't really think about it, to be 100 per cent honest. "We tried to build on the performance at Barcelona, all the good things we did there, and tried to win the game step by step. "We have the ball, we attack with whatever we have — they have the ball, we defend with whatever we have. And that made it a really special game. It was really difficult to play against us tonight." Liverpool took a seventh minute lead through Divock Origi and then struck twice after the break courtesy of substitute Georginio Wijnaldum before Origi got the crucial fourth goal. Throughout the match, Liverpool played with pulsating energy and gritty determination, while still being able to carve open a trembling Barcelona defense. "What the boys did — this mix, again, of big heart and football skills — is unbelievable," Klopp added. "But ... we didn't learn it in the first game, we knew it before already. "I said to the boys before the game, 'I don't think it's possible but because it's you I think we have a chance' — is because they are really mentality giants. "It's unbelievable after the season we played, the games we had, the injuries we have now in this moment." The German said few would have believed his team could get the result the needed to reach the final, where they will play Ajax Amsterdam or Tottenham Hotspur. "If you go out there and ask who bet a penny on us, I don't think you'll find a lot of people. And then going out there and putting (in) a performance like this on the pitch is unbelievable," he said. "I'm really proud to be the manager of this team. What they did tonight is so special and I will remember it forever. I don't know if it happened before and I don't know if it can happen again. The boys did it and it was brilliant." Klopp mentality behind Reds' historic comeback — Mourinho Liverpool's stunning victory over Barcelona in the Champions League semi-finals on Tuesday was made possible by the belief manager Juergen Klopp's has instilled in his squad, according to Jose Mourinho. Liverpool produced one of the greatest comebacks in the competition's history to beat Barcelona 4-0, overturning a three-goal first-leg deficit to advance to their second consecutive final with a 4-3 aggregate victory. "For me, this has one name — Juergen," Mourinho, who led Porto and Inter Milan to the Champions League title, told beIN Sports. "This is about him. This is a reflection of his personality — don't give up — his fighting spirit, every player giving everything. "He's not crying because he's missing (injured) players, he's not crying because they're playing 50 or 60 matches a season... Today is about Juergen's mentality. "This is not about tactics, not about philosophy. This is about heart and soul and fantastic empathy he has created with that group of players." Liverpool risked finishing the season without a trophy with Manchester City leading the Premier League title race with one game to go and Barcelona heavy favorites to advance to the final after a commanding win at the Nou Camp. But the thrilling victory over the Spanish champions gave the Merseyside club a chance of winning a sixth European Cup on June 1. Klopp's side were only the third team in the history of Europe's top club competition to come from three goals down after the first leg of a semifinal and progress, matching Panathinaikos in 1970-71 and Barcelona in 1985-86. "I didn't expect (this result)," Mourinho, who also coached Chelsea, Real Madrid and Manchester United, added. "I said if it's possible, Anfield is one of the places to make it possible. "They were at risk of finishing a fantastic season with nothing to celebrate and now they are one step away from being European champions." — Reuters