On August 11, 2019, Volynets won the USTA Girls 18s National Championships final, 6–2, 6–4 over Emma Navarro, earning her a wildcard entry into the singles main draw of the 2019 US Open. She lost in the first round to Bianca Andreescu, who went on to win the tournament. 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.

Chang has a career high WTA singles ranking of 265 achieved on 2 August 2021. She also has a career high WTA doubles ranking of 344 achieved on 16 August 2021. Chang won her first major ITF title at the 2021 Koser Jewelers Tennis Challenge in the doubles draw partnering Alexa Glatch.