Olga made her WTA debut on the tournament of Tashkent (tier III) where she reached as a LL the quarter finals, winning of Anne kremer and Linetskaya before losing to Megann Shaugnesshy.
Later that year she won her 2nd itf singles title in the $25.000 tournament in Minsk, Belarus
Early in 2005 Olga won her 3th itf singles title in the $25.000 of Bromma in Sweden where she beat in the final Emma Laine of Finland
Olga played her first grand slam maindraw during the Australian open 2006 where she maid it to the 3rd round when she came out of the qualification, she won 5 matches in a row and beat on her way Jelena Jankovic, who is currently the number 9 of the world.
One month later she played the qualifications in the tier II tournament of Antwerp-Belgium, the Proximus Diamond Games, where she reached the quater finals, on her way she beat in the 2nd round Daniella Hantuchova and was stopped by Nadia Petrova after a very though match 4-6 4-6.
This year didn't really start well for Olga, she lost her 5 first single matches but in Bangalore (tier III) she reached out of nowhere the semi finales. On her way she beat Alicia Molik in a though 3-setter and also forth seed Jelena kostinc. she lost against the defending champion of 2006, Marta Santangelo.
Entering the quali's of Roland Garros as 18th seeded, Olga won her very though first match and grew each match, eventualy making it to the maindraw and winning her first round against Yaroslava Shvedova, at that time number 77 of the world, in two very thight sets.
In the second round Olga lost to Sybille Bammer (20th seeded) in two sets.
During her first tournament on US soil as preperation for the USOpen, Olga maid it directly trough to the final in the $75.000 ITF tournament of Washington, unfortunately Olga couldn't win the final (losing 5-7 5-7 to Melinda Czink) but it was the first time Olga maid it to the final of such a big tournament.