Ilkay Gundogan reveals the boozy secret to Jurgen Klopp’s success at Borussia Dortmund

Klopp masterminded Dortmund's back-to-back Bundesliga triumphs before leaving and heading to Liverpool

ILKAY GUNDOGAN has revealed the secret to success at Dortmund under Jurgen Klopp - turning up drunk.

Klopp masterminded back-to-back Bundesliga titles in 2011 and 2012.

And Manchester City pass master Gundogan says that Klopp turned a blind eye to the Saturday night sessions that helped bond his players.

Germany ace Gundogan, 27, arrived between the two titles triumphs.

And he helped Dortmund shrug off a poor start to the season with a 28-game unbeaten run that set a club record and sealed another title.

In the Klopp biography 'Bring the Noise', Gundogan has explained how booze helped fuel their success.

He said: "We went out quite often as a team.

"There were a lot of singles in the squad. Sometimes you could see the after-effects in training on Sunday morning."

However, Klopp had to warn his players after some of the partied until 3am following a midweek win over Bayern Munich.

They found themselves behind to an early goal against rivals Schalke before fighting back to win.

Gundogan said: "Somebody told me a few of you went out during the week… I don’t know who, I don’t want to know.

"But I can tell you: these players should be happy we won yesterday.

"Otherwise we would have seen the biggest punishment in the history of club football!"

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