Liverpool take on Bundesliga side Dortmund at Anfield on Thursday night in the second leg of their Europa League quarter final clash.
The Europa League winners are awarded a Champions League spot next season and Klopp will be doing all he can to get one over on his former employers.
TEAM NEWS
Liverpool manager Jurgen Klopp has a decision to make on his strikers for the Europa League quarter-final second leg at home to Borussia Dortmund.
Daniel Sturridge was selected ahead of Divock Origi for Sunday's win against Stoke but the Belgium international was preferred for the first leg in Germany.
Captain Jordan Henderson has been ruled out for the rest of the season while striker Christian Benteke is still a couple of weeks away from fitness.
Provisional squad:
Provisional squad: Mignolet, Clyne, Lovren, Sakho, Moreno, Can, Milner, Lallana, Firmino, Coutinho, Origi, Ward, Toure, Skrtel, Smith, Allen, Lucas, Sturridge, Ibe, Ojo.
Head-to-head record
Dortmund and Liverpool have played each other three times in competitive fixtures in recent times and the German side are yet to beat the Premier League outfit.
Vladimir Smicer and Stephen Wright earned a Liverpool squad containing names such as Michael Owen and Emile Heskey a Champions League victory at Anfield all the way back in 2001 with the leg in Germany finishing 0-0.
While last week's game finished 1-1 with Mats Hummels netting just after the half time whistle to cancel out Divock Origi's first-half opener at Signal Iduna Park.
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