Borussia Dortmund general manager Michael Zorc has conceded that Julian Schieber could be sold by the club this summer.
A number of British sides are believed to be interested in the 25-year-old, with West Ham United and Celtic both reported to be keeping an eye on the situation, and it now appears that Dortmund are prepared to listen to offers.
"We have been talking to Julian Schieber and his agent in the last week," Zorc told Kicker.
"He had been out to have his Borussia Dortmund breakthrough within his first two years at the club.
"If he is out for a transfer after these first two years at our club, we would certainly be considering that. Of course."
Schieber joined Dortmund from Stuttgart in 2012.