[1] In June 2010, she became Ukrainian junior champion in all four disciplines (Straight pool, Eight-ball, Nine-ball, Ten-ball).

In December 2010, Polovyntschuk beat Viktorija Nahorna 6-3 and became Ukrainian champion for the first time, shortly after her 15th birthday.

At the Ukrainian championship in 2013 she won the titles in straight pool, ten-ball, and for the third consecutive year in nine-ball.

[2] At the 2016 European Pool Championships, Polovinchuk reached the final in eight-ball, in which she lost 3–6 to Kristina Tkach 3–6 despite having taken a 3–1 lead.

[2] Polovinchuk studied at the Economics and Business Faculty of Mykolas Romeris University, graduating at the top of her class in January 2019.