She is the second most successful player of all time on the tour behind Jasmin Ouschan, having won seven events beginning with the 2016 North Cyprus Open.

[6] Tkach then moved in 2009 to play straight pool competing in the Moscow Under 18 City Championship final, finishing as runner-up and also reaching the semi-finals in the women's competition nine-ball.

[2] A month later she reached her first adult Russian championship finals, but lost to Anna Maschirina (ten-ball) and Daria Sirotina (nine-ball).

After the European Championships, Tkach played in her first Euro Tour event, won her first medal, by finishing second at the 2014 North Cyprus Open, being defeated by Jasmin Ouschan.

[9] In June 2016, she won the 2016 North Cyprus Open, defeating Marharyta Fjafilawa 7–3, to win her first Euro Tour tournament.

[10] At the 2016 Junior European Championships won three events, defeating Diana Khodjaeva 5–3 and 6–5, (ten-ball, nine-ball) and Dina Fatychowa 5–1, (eight-ball).

[11] The following season Tkach won the 2016 Portugal Open against Ina Kaplan 7–4 winning her third Euro Tour event in a row.

[13] After finishing second in the one-year ranking of the Euro Tour after the Portugal Open, she qualified for the nine-ball Competition the World Games 2017.

Tkach was part of the European team that defeated the USA three times in a row in the first three editions of the Atlantic Challenge Cup (2015, 2016, 2017).