Her personal best and national record is 71.41 metres, set in July 2017 at the Galà dei Castelli meeting in Bellinzona, Switzerland.

She was ranked 5th in the 2008 junior world list with 55.89 m.[16] Elkasević suffered a very serious setback in early 2009, after doctors misdiagnosed her appendicitis.

[1] Her appendix burst after three days, which caused a near-fatal sepsis that required two emergency surgeries and a lengthy recovery.

[1] She lost 15 kilograms (33 lb) of body weight in the process and was initially not expected to return to full training before the end of the year.

[1][15] However, Elkasević resumed training after a three-month break, and returned to competition by winning the discus throw gold medal at the European Junior Championships in Novi Sad in July 2009, where she set a new national record with a 62.44 m throw, and also met the A standard for the World Championships.

[18] A month later, she placed 9th at her first major senior competition, the World Championships in Athletics held in Berlin, as the youngest discus thrower in the field, including the qualifiers.

On the same day, Elkasević set her outdoor personal best in shot put, at 16.02 m. She continued her strong throwing by taking gold in the under-23 section of the women's discus at the European Cup Winter Throwing meeting in Arles; her winning mark of 61.93 m would have been enough for silver in the senior competition.

[25] Her good form in 2010 culminated at the European Championships in Barcelona, where she won a gold medal in discus throw.

Elkasević struggled in the qualification and was even close to elimination as she failed to make the qualifying norm of 60.00 m, placing only 10th out of 12 athletes to advance to the final.

[28] Shortly after her victory at the Hanžeković Memorial in Zagreb on 1 September, Elkasević concluded the 2010 season by winning silver at the IAAF Continental Cup in Split.

[32] In June 2011, it was announced that Elkasević had failed two doping tests conducted in the month before at the Diamond League meetings in Rome and Shanghai.

[33][34] Elkasević stated that the positive results were due to Nox Pump, an American-made energy drink product she had been using without knowing it contained banned substances.

[37] The suspension ran until 7 December, keeping Elkasević out of competition for the rest of the 2011 season, including the World Championships.

[41] In the European Championships in Helsinki, Elkasević's main rival was Nadine Müller of Germany, the 2011 World Championships silver medalist and the 2012 world leading discus thrower with 68.89 m.[42] After successfully qualifying, Elkasević found herself in serious trouble in the final after posting two no-throws.

Under pressure, she threw 67.62 m in the third round, which ultimately proved too good for Müller and the rest of the field, and gave Elkasević her second European title.

Two weeks later, in the same Zurich stadium, Elkasević completed the 2014 Diamond League season with another win on the same day her original coach Ivan Ivančić died.

[44] In 2016, Elkasević completed a perfect season winning all eleven competitions she entered, including the Olympic Games and European Championships.

[citation needed] 2017 saw another near perfect season with nine out of eleven wins in all competitions including the World Championships in London.

[76] The party gained one seat from the electoral district but since the list leader, who was Mayor of Zagreb Milan Bandić himself, did not take his seat due to incompatibility of the positions of mayor and MP, Elkasević became a member of the Croatian Parliament and took the oath of office at the first session.