For all the ups and down Jurgen Klopp’s Liverpool have had this season, their biggest test so far will be the Europa League quarter-final clash at the Signal Iduna Park on Thursday.

It has not often been the case since he took over but the German manager will have all his first-choice players fit and available for this encounter and therein lies a dilemma as to what is the best the best team to field against the yellow army.

Dortmund have been in sizzling form this season and will go into the game as favorites to knock Liverpool out of the competition. So it will require the strongest set up from Klopp to stand any chance of getting a result from the first leg.

And it is understood that the manager has already taken a big decision about the line-up that he will throw against his old club.

Star striker Daniel Sturridge was not at his best against Tottenham Hotspur and it is expected that Klopp will bring young Divock Origi into the mix leaving the England international with a place on the bench.

With Roberto Firmino also fit after missing a couple of weeks, Liverpool are expected to fare a strong line-up even as Klopp returned to his previous home for the first time since the end of the last season.

He insisted that the game is more than just his home-coming and that the Reds will leave not stone unturned in their search for a result from this encounter.

I know a lot of people who will be happy to see me again, but it’s not the right situation to see friends. I have no problem if someone wants to hug me – if I know him!

“At the end it’s a football game,” Klopp said talking about the effect his relationship with Dortmund will have on the game.

Liverpool, as already mentioned are outsiders to even get a draw from this game but the German manager made it clear that it was a task that was not impossible.

“We have the highest mountain to climb, but it is possible,” Klopp said in his interview on the eve of the clash at Dortmund.

Do you think Origi deserves to start against Dortmund on Thursday?