Real Zaragoza and Rubin Kazan have established a preliminary agreement for the loan of Nikola Čumić until the end of the season, a deal which is contingent on a medical examination. The Aragonese club announced that the 27-year-old Serbian winger is arriving to reinforce the team's attack. This transfer is Zaragoza's third acquisition during the winter window. Čumić has two caps for the Serbian national team. In the 2025/2026 Premier Liga season for Rubin Kazan, he made 7 appearances and did not score. His current market value is estimated by Transfermarkt to be €1.20m.