Transfermarkt reports on Chelsea's interest in signing Kostoulas, adding to the competition from Brighton and Manchester United. Chelsea is keen on signing Kostoulas, joining the interest alongside Brighton and Manchester United. Olympiacos sporting director Darko Kovačević mentioned growing interest from major clubs but did not specify names.

Kostoulas has become a valuable asset for Olympiacos and is estimated to be worth 55 million euros by English evaluators. Luca Bendoni, a reporter for SkySport, mentions that Chelsea is pursuing the player's signature. The discussion amount for the transfer is placed at 42 million euros.

Chelsea are monitoring Olympiacos player Charalampos Kostoulas. Tottenham Hotspur, Aston Villa, and Nottingham Forest are also keeping an eye on Kostoulas, as well as his Olympiacos teammate Christos Mouzakitis, indicating a competitive interest among several Premier League clubs for the duo.