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Pep Guardiola hailed Jurgen Klopp’s “unstoppable” Borussia Dortmund side as unique, in a book released about the Catalan coach in 2014.

Guardiola, who took charge of Bundesliga giants Bayern Munich in 2013-14, was subject to a biography about his first season in Germany.

In the book entitled ‘Pep Confidential’, written by Marti Perarnau, the author reveals Guardiola’s admiration for Klopp’s Dortmund side.

Depsite winning 3-0 at the home of Dortmund in November 2013, the former Barcelona boss reveals his admiration for how Klopp’s side play.

Guardiola told Perarnau: They’re like a steamroller, unstoppable. There are other teams who counter-attack brilliantly, like Madrid for example, but Dortmund are unique.

“I’ve never seen anything like it.

“They are completely focused for 90 minutes, waiting for you to mess up a pass so that they can set their sprinters on you.

“I must take some time to really study this and see if there’s any way to stop them.”

(Image: Richard Sellers/PA Wire.)

Current Germany national team boss Joachim Low, meanwhile, has added to the tributes ahead of Klopp’s expected move to Anfield.

The World Cup winner, speaking before his nation’s Euro 2016 qualifier with Ireland, said: “I think there are strong parallels between Dortmund and Liverpool with the passion and size of their support.

“I think it is a good fit.

“I’m not party to the negotiations between Liverpool and Mr Klopp so I don’t know how they are progressing, but if an agreement can be reached it will be good for both.”