As Stevens notes, the midfielder will not be renewing his deal with BVB and has little more than one year left on his contract at Signal Iduna Park. That could well see the Bundesliga outfit cash in on him this summer rather than let him go for free the following year.
The 25-year-old, who has three goals and seven assists to his name this season, would make a star signing for any Premier League side.
As the following video demonstrates, he has an outstanding presence in midfield thanks to his incredible passing and ability to beat players:
Squawka Football further revealed the extent of his unrivalled distribution:
According to German outlet Bild (h/t football writer Alex Chaffer), Gundogan is much more likely to go to City, Barcelona or stay with Dortmund than head anywhere else, though:
However, having formerly worked with Klopp during his time at BVB, it's likely Anfield holds great pulling power for Gundogan or any other wantaway Dortmund star as a move there would reunite them.
Pep Guardiola's Man City or Barca will also undoubtedly prove tempting, but it's impossible to rule out the prospect of Gundogan joining up with Klopp.
The 23-year-old has struggled to develop as anticipated at the Allianz Arena and this season has been restricted to just 12 appearances in all competitions due to injury, so it wouldn't be overly surprising if he moved on this summer.
Gotze would make an excellent signing for Liverpool, who have room for another player in their attacking midfield three alongside Roberto Firmino and Philippe Coutinho. Reds legend Jamie Carragher believes he and Gundogan would be good signings:
Bundesliga writer Raphael Honigstein noted in January that Gotze to Liverpool is a realistic possibility:
If BVB are also interested in signing him, the German could face a real dilemma—to rejoin his old club where he was beloved and successful, or reunite with the manager who brought the best out of him as a player.
Once again, it's far from guaranteed he'll go to Liverpool, but they stand a strong chance of getting him. Should they recruit one or both German stars, they could become a real force to be reckoned with next season.