'''Katherine Sebov''' (born January 5, 1999 in Toronto, Ontario, Canada) is a Canadian professional tennis player. She reached a career high WTA singles ranking of No. 200199 on January 714, 2019 and a career high ITF junior ranking of No. 22 on July 20, 2015. In 2017, she reached her first professional final at the ITF 60K in [[Challenger Banque Nationale de Granby|Granby]] but was defeated by Cristiana Ferrando. In 2018 at the ITF 25K in Toyota, Sebov reached her second final, losing to Dejana Radanović in three sets. In 2018, she won her first professional title at the ITF 60K in [[Challenger Banque Nationale de Saguenay|Saguenay]], defeating Quirine Lemoine in the final.
Sebov was born in Toronto and is of Ukrainian descent. Her coaches are Simon Bartram in Toronto and Robert Lansdorp in Los Angeles.