Eintracht Frankfurt are fighting to keep hold of Ante Rebic.
The Croatia attacker is a target for Tottenham, which have been following him since his days with RNK Split.
BILD says Eintracht Frankfurt know Rebic's form at the World Cup is sparking interest from across Europe - with Spurs head of the queue.
The Germans are willing to up his current €1.5m salary to convince the winger to stay.
Eintracht will lose a massive 50 per cent cut of any fee raised from Rebic's sale this summer to former club Fiorentina.