It is reported that Borussia Dortmund are prepared to pursue 18-year-old Serbian midfielder Vasilije Kostov for a potential fee as high as 25,000,000 euros. The German club views Kostov as a possible midfield replacement, and the interest is part of their policy of signing young players for development. Arsenal and Inter have also been associated with the midfielder, who is under contract with Red Star Belgrade until June 2028.