Real Valladolid face a battle to keep hold of teen Ivan Fresneda.
The 18 year-old has been a revelation in La Liga this season and is attracting interest from across Europe, says Marca.
Atletico Madrid have already failed with an offer for the wing-back, who also has Inter Milan, Juventus and AC Milan following his progress.
Juve, for the moment, have shown the strongest interest.
Fresneda has just seen his buyout clause jump from €10m to €30m - and that will rise again to €45m once he completes 22 games.