 During the summer of 2013, Red Star participated in the Uhrencup in Switzerland, where they lost the final against FC Basel with a score of 2–1.Mladenović scored for Red Star and was voted best player of the game, for which he was supposed to get a watch as a prize, but he rejected it out of disappointment with the loss.By the end of 2013, Red Star's financial situation became very unstable as players and staff were not getting paid after several months of waiting.