Radivoje Kalajdzic started his career aged 29 on June 2011. After 18 fights, Kalajdzic remains unbeaten with no sign of being beaten after building up his record of 17 wins and a career lasting 6 years so far. The longest win streak that Kalajdzic has ever recorded was between June 2011 and October 2015 when it totaled 9 wins. Kalajdzic's longest KO streak is 4 fights long.
Getting rid of his debut fight nerves early, Kalajdzic took on Nyantu Bolo in June 2011 and claimed a stoppage victory (round 1, KO). Kalajdzic was the first person to have ever stopped Bolo. Following on from his debut, Kalajdzic continued his career by fighting in a further 9 fights. In this time he fought Jerrod Caldwell, Shannon Anderson and Eliseo Durazo to name just a few, fighting 3 times in 2011 and 6 times in 2012 in this period.
Kalajdzic then went on to fight and beat Richmond Dalphone on November 18th, 2011 maintaining his unbeaten record. Dalphone was stopped in the 3rd round via TKO crowning Kalajdzic as the first person to stop this opponent. Taking his record to 4-0-0. Kalajdzic then went on to win his next fight against Percey Givens.
Kalajdzic then went on to fight and beat Eliseo Durazo on February 10th, 2012 maintaining his unbeaten record. Continuing his career, Kalajdzic fought Eliseo Durazo in 2012 over 4 rounds. Kalajdzic was the 4th person to go the distance with Eliseo Durazo.
Next was Mark Sanders on June 1st, 2012 where Kalajdzic took the win continuing his unbeaten streak. Continuing his career, Kalajdzic fought Mark Sanders in 2012 over 6 rounds. Kalajdzic was the 5th person to go the distance with Mark Sanders. Fights against boxers including Dennis Sharpe, Otis Griffin and Donta Woods followed where he won 7 fights taking his winning streak to 12 wins.
Charles Hayward was Kalajdzic's next fight on November 23rd, 2013 and also the next win in his career via TKO. This took his record to 13-0-0 showing a mainly successful career to date. Kalajdzic was the 2nd person to stop Charles and he did it in the 1st round via TKO. The fight was due to last 8 rounds. Kalajdzic took on another 2 opponents next, racking up wins against Lionell Thompson and Samson Onyango.
Rayco Saunders was the next fight for Kalajdzic on October 3rd, 2014 and also his next career win. Saunders was a great challenge for Kalajdzic, losing over the full 6 round distance and crowning Kalajdzic as the 25th person to have defeated Saunders.
Radivoje Kalajdzic added another win to his record by beating Gilberto matheus Domingos on October 10th, 2015, upping his record to 17 wins. Taking his total win streak to 17 wins, Kalajdzic defeated Domingos in the 8 round fight. The win came via TKO in the 1st round. Kalajdzic was the 4th to stop Domingos.