Albion look at former Real Madrid left back
The 20-year-old featured in a reserve team run-out today against Bournemouth alongside fellow Albion target Darren Carter in a game which Brighton won 2v0.
Mansur has also attracted interest from West Ham United and Albion manager Gustavo Poyet is keen to add back up at left back to his squad.
Brighton already have strong links to Spain, with Spanish legend Vicente having joining the Seagulls earlier this season now appearing alongside Inigo Calderon in the starting 11.