Dario Grgić, a 22-year-old Serbian attacking midfielder, has completed a transfer from Železničar to Sigma. He departs from Železničar, which is currently fifth in the Super lige Srbije. Grgić joined the club in July 2023 and contributed 3 goals and 1 assist in 14 league appearances this season. He has four caps for the Serbia U19 team and his current market value is €1.80m, according to Transfermarkt.