Wikipedia - Kateryna Volodko

Kateryna Volodymyrivna Volodko (née Bondarenko; Ukrainian: Катерина Володимирівна Бондаренко; born 8 August 1986) is a tennis player from Ukraine. She was the doubles champion in 2008 at the Australian Open, partnering her sister Alona Bondarenko. Kateryna is the younger sister of professional tennis players Valeria and Alona.

She plays right-handed and turned pro in 2000. Her career-high rankings in singles and doubles are world No. 29 and No. 9, respectively.

Her best Grand Slam performance in singles was reaching the quarterfinals at the 2009 US Open.

Over her career, Bondarenko has defeated top ten players Elena Dementieva, Sara Errani, Ana Ivanovic, Garbiñe Muguruza, Li Na, Agnieszka Radwańska, Roberta Vinci, and Venus Williams.