Career
As a professional, her highest career singles ranking is World Number. Lyubtsova played in her first Women's Tennis Association Tour event when she qualified to play in the 2009 Open GDF Suez. She lost in the first round to the 4th seeded Polish teenager Agnieszka Radwańska 6–1, 6–1.
Her highest Women's Tennis Association singles ranking is 141st, which she reached on 21 July 2008.