2011
Bondarenko began her 2011 campaign at the 2011 ASB Classic in Auckland. Ranked No. 99, she advanced to the quarterfinals before losing to Julia Goerges. She then failed to qualify at the 2011 Moorilla Hobart International, but made the doubles final with Liga Dekmeijere, losing to Italian duo Sara Errani and Roberta Vinci. At the 2011 Australian Open, Bondarenko faced Peng Shuai in the first round and lost 2–6, 6–3, 8–6.
She then participated in Fed Cup where she won both singles matches against Sweden's Johanna Larsson and Sofia Arvidsson. Kateryna then failed to qualify in Dubai and Doha. She then lost to Magdalena Rybarikova in the second round of an ITF event in The Bahamas. Her poor form continued, as she failed to qualify in Miami and Rome. Bondarenko lost in the final round of qualifying to local girl Stephanie Foretz Gacon at the 2011 Internationaux de Strasbourg. She lost in the first round of the 2011 French Open to Rebecca Marino.
Kateryna opened her grass court sesason at the 2011 Unicef Open, but lost to World No. 97 Vesna Dolonts in the first round. Her fortunes began to change at Wimbledon, where she advanced to the third round for the first time in her career. Bondarenko defeated Alize Cornet and Sara Errani before losing to former World No. 3 Nadia Petrova. She then made the quarterfinals in Budapest, losing there to Klara Zakopalova. Her best showing of the year came in Bad Gastein at the 2011 Gastein Ladies, where she made the semifinals. Bondarenko advanced to the semis defeating Nuria Llagostera Vives, Johanna Larsson, and Carla Suarez Navarro before losing to Spaniard Maria Jose Martinez Sanchez.
After losing in the quarterfinals of the inaugural 2011 Baku Cup, she missed out on qualifying in Toronto and Cincinnati, losing to Galina Voskoboeva and Petra Cetkovska, respectively. After winning two matches to qualify for the 2011 Texas Tennis Open, she cruised into the quarterfinals where she was soundly beaten by in-form German Sabine Lisicki. At the US Open, Bondarenko won her first round against Lucie Hradecka. She lost in the second round to 2nd seed and 2010 finalist Vera Zvonareva in a tough three sets.
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