On 30 June 2006, Radović signed with Polish club Legia Warsaw on a four-year deal. He made his official debut for the side on 22 July 2006, as they lost their Super Cup match 1–2 to Wisła Płock. On 12 August 2006, Radović scored his first goal for Legia in a 1–2 home league loss to GKS Bełchatów. He made a total of 27 league appearances and scored six goals in his first season at the club. In the following season, Radović won his first trophy with Legia by beating Wisła Kraków in the 2007–08 Polish Cup final after penalties.