After an unusual catch of KT4 on route 6, even more unusual thing appeared: TMK 2100 on route 7. A derailment of tram 2264 on route 17 occured at intersection of Savska and Vukovarska roads which caused a major service disruption. It caused a diversion of some routes towards Ljubljanica terminus, howewer this tram ran as route 7 instead. After the derailment was cleared, it returned to route 5.

TMK 2100 trams regularly cannot run on route 7 due to depot assignment: they are located in Trešnjevka, while route 7 is operated by Dubrava.