Ermin Mahmic, a 21-year-old attacking midfielder for Slovan Liberec, is being observed by clubs from other countries, with German club RB Leipzig being one of the interested teams. Several other clubs, including Germany's FC Köln and Eintracht Frankfurt, have also been associated with a potential transfer. According to reports from June 2026, Slovan Liberec is demanding a transfer fee of more than €10 million after the club reportedly rejected an offer from Sigma Olomouc in January 2026.