Nadezhda Viktorovna Petrova (Russian: ??????? ?????????? ???????; born 8 June 1982) is a retired Russian tennis player.
In her career, she won 37 titles on the WTA Tour, 13 in singles and 24 in doubles.
In singles, she reached a career-high ranking of world No.
3 in May 2006, and reached the semifinals of the French Open in 2003 and 2005.
She won the Tier-I tournaments in Charleston and Berlin in 2006 as well as Tokyo 2012.
In doubles, Petrova won the year-ending WTA Championships in 2004 with Meghann Shaughnessy, and in 2012 with Maria Kirilenko.
With Kirilenko, she also won the bronze medal in the doubles competition at the 2012 Summer Olympics.