Manchester United boss Jose Mourinho has been encouraged in his pursuit of Eintracht Frankfurt attacker Ante Rebic.
Mourinho see Rebic as the winger he is seeking to add to his squad this summer
And Eintracht Frankfurt chief Fredi Bobic admitted a big offer would be enough for the Bundesliga side to step aside.
He said: "The players and the coaching team are watching the World Cup games together in the training camp in the USA and are especially excited about Rebic.
"So far there are no offers available and we're planning a steady season with Ante Rebic for the new season.
"Of course we know that a lot can happen when a big club makes an offer.
"We cannot compete economically with the big ones, but that's nothing new."