Brentford want Blackburn goalkeeper David Raya.
The Bees have made an approach for Spaniard Raya, who joined Rovers from Barcelona-based outfit UE Cornellà in 2012.
The two clubs have held discussions over a potential deal but are yet to reach an agreement.
Brentford have targeted Raya, 23, amid doubts over the futures of keepers Daniel Bentley and Luke Daniels, who both have a year remaining on their contracts at Griffin Park.
Third-choice keeper Jack Bonham is among the out-of-contract players being released by Brentford this summer.