Bayern Munich president Uli Hoeness has warned that the German champions' bid to sign defender Niklas Sule could fall through due to Hoffenheim's reported asking price of €25 million.
Unbeaten this season, Hoffenheim are in no rush to sell Sule, 21, who has been strongly linked with Bayern in recent weeks. The centre-back is under contract with Hoffenheim until 2019, although he is reported to have agreed terms on a five-year deal with Bundesliga leaders Bayern.
Sources told ESPN FC last month that Chelsea are also interested in the recently capped Germany international and Hoeness has conceded that a summer move to Bayern is not a formality.
"There are still major problems," he told kicker. "The transfer fee could seriously jeopardise the deal."
Kicker claims that AC Milan, Inter Milan and Paris Saint-Germain are also tracking the situation.
Versatile Hoffenheim player Sebastian Rudy is also reported to be joining Bayern next summer.