After coming through the youth systems Željezničar and Red Star Belgrade, Koroman played for Radnički Kragujevac, Spartak Subotica, and OFK Beograd in the First League of FR Yugoslavia. He spent a year and a half with each side, before moving abroad in the 2002 winter transfer window. While playing for Russian Premier League clubs Dynamo Moscow, Krylia Sovetov Samara, and Terek Grozny, Koroman amassed 94 appearances and scored 16 goals in the top flight, being named in the league's best 33 players for the 2002 season. In January 2006, Koroman moved on loan to English club Portsmouth. He made three appearances for the side in the league, scoring on the final day of the season in a 3–1 loss to Liverpool. In August of the same year, Koroman returned to Portsmouth on a season-long loan. He appeared in three games before leaving the club in the 2007 winter transfer window. In February 2007, Koroman returned to Serbia and joined his parent club Red Star Belgrade on a seven-month loan deal. He helped the side win the double in the 2006–07season. In August 2007, Koroman signed a permanent contract with the club. In July 2009, Koroman moved to Asia and signed with Korean club Incheon United. He thus rejoined his former manager Ilija Petković. In June 2010, Koroman returned to Red Star Belgrade, penning a two-year contract. However, he left the club after just one season. In June 2011, Koroman returned to Russia and joined his former club Krylia Sovetov Samara, signing a two-and-a-half-year deal. He appeared in nine league games and scored one goal in the first half of the 2011–12 season, before being demoted to the youth squad. In June 2013, Koroman said that he would end his career after his contract with Krylia expires in December of that year.
International career
Koroman was capped 36 times and scored once for Serbia from 2002 to 2007. He was a member of the Serbia and Montenegro team in the 2006 FIFA World Cup, making two appearances and receiving two yellow cards in the process.
Koroman started off his managerial career at Serbian First League club Žarkovo, being appointed manager on 21 May 2019. He started of well, as his team beat Budućnost Dobanovci 4–0 in his first game in charge. However, things changed quickly, as in the next 14 games with Koroman as manager, Žarkovo managed to win only three more games, while from September to October, the team didn't manage to win any game. These results made Koroman resign on 17 October 2019, not even five months after becoming manager.
