Mileva competed at her first World Championships in 2009 where she finished fifty-sixth in the all-around during the qualification round. She then went to the 2010 European Championships and finished thirty-second in the all-around qualification. She also competed at the 2010 World Championships and finished 114th in the all-around qualifications. At the 2011 World Championships in Tokyo, she finished 124th in the all-around qualifications.