Goals from Divock Origi, Mamadou Sakho, Philippe Coutinho and Lovren capped off a memorable display.
And Klopp says he reminded his players of Liverpool’s famous night in Istanbul, that saw them come from three goals down to AC Milan, to motivate them.
He said: “I told the lads I was not there but a few Liverpool players a little bit older, most of them as experts as television pundits now, were 3-0 down at half-time and won a Champions League final – we should try it and they did it.”
“It’s hard to believe. It was difficult to explain. It was a wonderful, wonderful night.
“To be honest the game was strange from the beginning.
"The whole game showed the quality of Dortmund. It’s absolutely great."
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