Kolarov started the 2005-06 campaign for Čukarički in the second-tier league competition, but during the winter break controversially transferred to top-tier league club OFK Beograd.
Kolarov's first goal for Lazio came at the Stadio Oreste Granillo in Reggio Calabria on 30 September 2007, as he hit a rocket from 38 metres to secure a draw against lowly Reggina [REF].