Ermin Mahmić, a 21-year-old attacking midfielder from Bosnia-Herzegovina, has rejected offers from both FC Basel and Red Bull Salzburg. Each club proposed a transfer fee of €4-5 million plus a percentage of a future sale. For the last two weeks, Celtic has been a potential destination for the FC Slovan Liberec player. The Scottish club has gathered information on a potential deal and the required fee. The Czech club has reportedly set the fee at €7-8 million. Celtic is able to meet this valuation but has not yet made a final decision or a formal offer. Beşiktaş has also shown interest in recent weeks, but a move to the club is not considered realistic. Mahmić has 5 caps and 2 goals for his country. He joined Slovan Liberec in July 2025 and is under contract until June 2029. His current Transfermarkt valuation is €7.00m. It was reported in June and July 2026 that the club was demanding a fee of more than €10 million from interested German clubs.