Milić made her WTA main-draw debut at the 2021 Zavarovalnica Sava Portorož after receiving a wildcard for the doubles main draw.

[citation needed] Given a wildcard entry into the WTA 125 2023 Zavarovalnica Sava Ljubljana, Milić lost in the first round to third seed Dalma Gálfi in three sets.

[2] In April 2024, she played for Slovenia in the Billie Jean King Cup qualifying tie against Slovakia.

[3] Milić lost in the opening singles match to Anna Karolína Schmiedlová [4] and, partnering with Pia Lovrič, was also defeated in the dead rubber doubles against Viktória Hrunčáková and Tereza Mihalíková.

[5] Again given a wildcard for the 2024 Zavarovalnica Sava Ljubljana, she once more lost in the first round, this time to Anastasiia Sobolieva.