Date of Birth: 
Place of Birth: Slavyansk-na-Kubani, Russia
About Tatyana Polnova
- Tatyana Polnova (Russian: ?????´?? ???????), née Zaykova (??´?????, born 20 April 1979) is a Russian pole vaulter.
- Between 1998 and 2002 she competed for Turkey under the Turkish name Tuna Köstem.
- She is currently Fenerbahçe Athletics Club member. Her personal best is 4.78 metres, achieved in September 2004 in Monaco.
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