Career
Having already played for Croatia, Njirić made semi-finals at the 2010 junior French Open, losing to Elina Svitolina of Ukraine. On 5 October 2015, she reached her best singles ranking of world number 421. On 23 July 2012, she peaked at world number 290 in the doubles rankings.
Singles Finals: 5 (4-1) Doubles: 13 (5–8).