Donna Vekic defeated Nuria Parrizas Diaz 6–2, 6–2 in the first round of the Australian Open on hard court on 21 January 2023, confirming her status as the clear pre-match favourite with odds of 1.37 to Parrizas Diaz's 3.36. The Croatian secured a dominant performance, dropping only four games across both sets against her Spanish opponent. The commanding victory underlined Vekic's form heading into the tournament and sets up a second-round encounter against higher-ranked opposition. Vekic's convincing display on the Melbourne hardcourt suggests she entered the Australian Open with considerable momentum.