She made her debut at the Olympic Games in Athens, 2004. year. She won the bronze medal in the 200 m backstroke at the European Championships in large pools in Madrid, 2004. Set more than 170 Croatian swimming records in different age categories. At the European Swimming Championships Short Course in the Hungarian city of Debrecen, won a silver medal in the 100 meters backstroke with a new Croatian record 2007th, a day after she won a gold medal and set a new world record in the 50m backstroke in a time of 26.50 seconds. At the European Swimming Championships Short Course in Istanbul 2009th The Sanja Jovanovic won the silver medal in 100 m backstroke and 12th December gold medal in the 50m backstroke and when this broke the world record time of 25.70 seconds.