Championship club Birmingham City are monitoring 18-year-old Serbian attacking midfielder Vasilije Kostov. Crvena Zvezda are not hurrying to sell the player, as he is under contract until 2028. Coventry City also have detailed interest. Ontheminute.com is cited as stating that the Premier League club is closely following the teenager's progress. It is said that Kostov is one of numerous names on Coventry's wider list of targets. Zvezda's general director Zvezdan Terzić had previously stated in June that the club would not sell Kostov for less than €20 million. Milan, Inter, Monaco, and Arsenal are other clubs that have been linked with the player. Kostov has four caps for Serbia, and his current market value is €25.00m, according to Transfermarkt. It was reported that Monaco was linked with a €10 million bid in September 2026. In March 2026, it was reported that a €20 million bid from Arsenal was rejected.