Nadezhda Viktorovna Petrova (Надежда Викторовна Петрова; born June 8, 1982 in Moscow, Soviet Union) is a Russian professional tennis player.
Overall, she has won 28 WTA Titles, ten in singles and eighteen in doubles. In singles, Petrova has reached a career high ranking of World No. 3 in May 2006 and has reached the semi-finals of the French Open in 2003 and 2005. In doubles, she won the year-ending Sony Ericsson Championships in 2004 with Meghann Shaughnessy. As of 29 August 2011 (2011 -08-29), Petrova is ranked World No. 30 in singles and World No. 9 in doubles.
Petrova was born in Moscow. Her parents were both very athletic – her father Viktor was a leading hammer thrower, while her mother Nadezhda Ilyina won a bronze medal at the 1976 Montreal Olympics in the 400 meter relay. Both her parents are still athletics coaches. As a child, Nadia did a lot of travelling around the world with her parents. She eventually settled in Egypt, where she trained with Mohammed Seif and her parents. Petrova states hard courts as her favourite surface, however, she has been most successful on clay courts. She is currently coached by Vladimir Platenik