Athletico Paranaense chief Luiz Felipe Scolari admits Vitor Roque is set to be sold.
The young striker is a target for Barcelona and Newcastle United.
Big Phil told Globoesporte: "I think we won't be able to retain Vitor Roque, but who knows if we can hold him until the end of the year.
"I think it would be the best for him and for Athletico. There is no defined situation.
"If he has to be sold, I am of the opinion that you have to sell him."
Barca are favourites to sign Roque, who can leave Athletico for a fee of 35m plus 10m in bonuses.