Barcelona will require over €100m to sign permanently on-loan pair Joao Felix and Joao Cancelo.
Felix is on-loan from Atletico Madrid and Cancelo from Manchester City, with the pair outstanding for Barca since their arrival.
Mundo Deportivo says to turn their deals into a permanent transfers Barca will have to find over €100m.
City are prepared to sell Cancelo for €25m at the end of the season.
Meanwhile, Atletico want €80m for Felix to leave outright, having originally signed the striker from Benfica for €120m.