Manchester City target Marc Cucurella has handed in a transfer request at Brighton.
The Seagulls have already rejected one bid from City for the defender and are understood to be holding out for a £50m fee for the former Barcelona player.
The 24-year-old left-back joined Brighton from Getafe last summer.
He has been identified by City manager Pep Guardiola as a replacement for Oleksandr Zinchenko, who left City to join Arsenal this summer.
Cucurella is understood to feel Brighton's asking price is unrealistic.
A Barcelona academy graduate, he has one senior cap for Spain and played for the under-23 side that won silver at the 2020 Tokyo Olympic Games.