Brighton, who have been fielding offers for Moises Caicedo in recent days, have agreed terms on a four year deal with free agent Mahmoud Dahoud, 27, after the Germany midfielder left Borussia Dortmund.
Three clubs are in for Caicedo who is valued around £80m while Liverpool are trying to tie up a deal for Alexis Mac Allister.
Roberto De Zerbi's Seagulls are attracting plenty of interest ahead of the summer window following their exceptional Premier League campaign this term, as they finished sixth in the table and secured a Europa League spot last week.