Former Leicester forward Andrej Kramaric could be allowed to leave Hoffenheim if a bid of €50 million (£43.9m/$57.9m) is made this summer.
The striker is a reported target of both Bayern Munich and Newcastle United, who are watching the Croatian after he has impressed during his three years at Hoffenheim.
He has scored 102 times from his 179 games in all competitions for the German side and also started in Croatia’s opening 2-0 victory against Nigeria at the World Cup.
Hoffenheim’s sporting director Alexander Rosen says the club rejected an offer for Kramaric in January, but did not rule out selling the player if a suitable bid is received in the summer.
"I never rule out anything, that's not in our business," Rosen told TZ: “We had an offer of €30m (£26.3m/$34.8m) for Andrej from Italy during the winter the break. That was not an option for us.
“But what happens if €50m is offered I cannot say.”
Kramaric previously made the move to England to join Leicester City in 2014 for a then-club record fee of £9m ($11.9m), but the 26-year-old failed to make an impression at the King Power Stadium, making just 20 appearances in all competitions during his one-and-a-half-year spell in England.
He was sent out on loan to Hoffenheim in January 2016 and the move was made permanent that summer, with his 13-league goal season this year marking him out as an in-demand forward.
Kramaric, who is under contract at Hoffenheim until 2020, recently spoke to Goal about the rumours of him moving away following suggestions Bayern are planning an approach.
"I saw what the media have said [about Bayern links] but take it easy, there is plenty of time,” he said. "My priority is the World Cup now. There is plenty of time to discuss a potential transfer.
"I'm very happy and enjoy being here, I've always loved the Bundesliga and coming to Hoffenheim was a great move. This is a perfectly organised club.
"I'm satisfied with my goals and assists this season. Last season I scored 15 goals but this season I've also played some matches as a midfielder. This was a very, very good season."