Eintracht Frankfurt sporting director Bruno Hubner admits they face a major battle to keep hold of Andre Silva.
The Portugal international has been a revelation in this season's Bundesliga, with his form attracting interest from Manchester United and Barcelona.
"The Champions League would be a big argument, otherwise it will be difficult to keep a player like that," conceded Hubner.
“André is intelligent and knows what he owes Eintracht Frankfurt.
"He has made a sensational development with us, he will certainly include that in his considerations."
