However, over the winter 2002–03 break in January 2003, Janković was loaned out to lower division side Jedinstvo Ub along with Dušan Basta and Aleksandar Luković in order to gain valuable experience through regular playing time. Over the next season and a half in Ub, he excelled in attacking midfielder position, scoring 21 league goals in 28 matches. At the beginning of 2003–04 league season, Jankovic along with a group of other Red Star youth players was registered both for Red Star and Jedinstvo, which in practice meant that he trained with Red Star during the week while playing league matches for Jedinstvo on Saturdays. However, following the winter break, head coach Slavoljub Muslin decided to discontinue this practice making the players both train and play with Jedinstvo.