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Borussia Dortmund have opened the door for Mario Gotze to return – but only if he explains his controversial move to Bayern Munich to the supporters.

Gotze is one of Liverpool’s top transfer targets, with Jurgen Klopp keen on reuniting with the World Cup winner.

Klopp’s relationship with the 23-year-old is founded on their successful years together at Dortmund, but now the Bundesliga club could go head-to-head with him this summer.

It was thought Gotze’s former club wanted to bring him back to Westfalenstadion, but chief executive Hans-Joachim Watzke’s admission represents the first public acknowledgement of their interest.

Speaking at a conference, Watzke said: “If he’s on the market, it’s clear if we discuss about him.

“The door is always open for every player who comes from Dortmund.”

Dortmund fans are said to be unhappy at the possibility of Gotze’s return after his 37m euros move to rivals Bayern in 2013 – announced just days before the club’s Champions League semi-final against Real Madrid.

Banners have been displayed in BVB’s stadium expressing their disdain for Gotze, but Watzke does not feel that will be a stumbling block.

He added: “If he returns we have to talk with the fans and he has to explain how he left for Bayern.

“But I don’t think that they won’t give him a second chance.”