After initially playing for their youth team, Leković was promoted to the senior squad in May 2008, making his Serbian SuperLiga debut in a 0–1 home loss to Hajduk Kula.
He spent two more seasons at the club, as the side competed in the Serbian First League, before securing a transfer to Rad in the summer of 2010.
[2] He scored a goal in the 90th minute of a 1–2 away loss against Moldovan champions Sheriff Tiraspol in the 2013–14 UEFA Europa League play-off round, as Vojvodina were eliminated.
On 30 December 2019, Leković signed a two-and-a-half-year contract with Bosnian Premier League club Tuzla City.
[8] Leković represented Serbia at under-21 level, making two appearances in the team's unsuccessful qualifiers for the 2011 UEFA Under-21 Championship.