Eintracht Frankfurt coach Adi Hutter admits they face losing Luka Jovic this summer.
On-loan from Benfica, Jovic's form has attracted the interest of Europe's biggest clubs, including Barcelona, Real Madrid, Chelsea, Manchester City and Bayern Munich.
Eintracht Frankfurt can buy Jovic for €7m and would seek to sell for €60m.
Hutter said: "For me it is common practice in football that good players are also difficult to hold.
"If, for example, a Luka Jovic changes in the summer, then we have done some right things at Eintracht. And then Eintracht Frankfurt is also a club that is a springboard for players."