Alona Volodymyrivna Bondarenko Dyachok (Ukrainian: ?????? ????????????? ??????????, born 13 August 1984) is a Ukrainian tennis player.
Her younger sister Kateryna Bondarenko also plays on the WTA Tour.
Her career-high singles ranking is No.
19, achieved on 14 April 2008.
She defeated former world No.
1 Jelena Jankovic in the third round of the 2010 Australian Open, and won the 2008 Australian Open women's doubles tournament with her sister Kateryna, beating Victoria Azarenka and Shahar Pe'er in the finals.
She also formerly paired with her older sister Valeria in doubles.