On 2 July 2018, she reached her best WTA singles ranking of world No.

Radanović has represented Serbia in the Fed Cup, where she has a win–loss record of 4–6.

She made her WTA Tour main-draw debut through qualifying at the 2018 Nürnberger Versicherungscup, losing in the first round to two-time defending champion Kiki Bertens.

Partnering with compatriot Nikola Ćaćić, she made her debut at the United Cup as part of team Serbia.

Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records.