“Congratulations, from the bottom of my heart,” he said. “[A] great story, cool, nobody will forget this story.”
On the strength of Spanish football, the German said: “Spanish football is really impressive. Combine really good players with good tactical advice from outside.
“There will be a lot of Spanish teams in the European finals. Hopefully we can go there with the English flag.”
Liverpool are looking to reach their first European final since 2007, but must overcome a 1-0 defeat in the first-leg.