[1] At the 2014 Winter Olympics he carried Serbian flag at the opening ceremony and competed in biathlon and cross-country skiing.

At the 2013 Winter Universiade he made a remarkable success by winning first ever international medals for Serbia in biathlon and cross-country skiing.

The biggest successes in his career so far, Petrović achieved in 2012/13 season of World Cup.

[10][11] Petrović finished 35th in Pursuit in Oslo, during the 7th stage of World Cup and won new points.

[15] At the 2013 Winter Universiade held in Trentino, Italy, Petrović won first ever international Serbian cross-country medal, gold in 10 km freestyle and achieved the best ever Serbian points 18.48 therefore Serbia managed to qualify for the first time two male athletes for the Olympic Games in cross-country skiing.