The Germany international was a key part of the now Reds chief’s BVB side, winning the Bundesliga title in 2011/12 before helping the yellow-clad outfit the Champions League Final in 2013 – he netted a penalty against Bayern Munich in the showpiece game at Wembley.
As a result of his showings, the 25-year-old has long been linked with a move away from the Westfalenstadion, with reports earlier this year having claimed that Manchester United had all but sealed a deal for the playmaker.
However, he remains at Dortmund, but Metro, citing Fichajes, believe that Liverpool may be able to lure him to Anfield, with the presence of Klopp key.
Gundogan himself recently talked up the club and his ex-manager, fuelling transfer speculation.
Liverpool have a wealth of central midfield options, but the playmaker offers the sort of creativity that few in Klopp’s current ranks boast.