Before 1968, during the era of the amateur player, it was Suzanne Lenglen, with 15 titles.
After 1967, when tennis was made "open", Martina Navratilova, with 11 titles.
And with a career that bridged both eras, Margaret Court won 13 French titles.
German female tennis player Steffi Graf has 22 Grand Slam titles in her name.
René Lacoste (1904 - 1996) won three French Open titles, two Wimbledon titles, and two U.S. Open titles. Yannik Noah is also a famous French tennis player. He won the French Open in 1983.
In the modern era, Bjorn Borg has won 6 French Open singles titles.
Rafael Nadal
Rafael Nadal (7 Titles 2005,2006,2007,2008,2010,2011 And 2012)
Billie Jean King and Martina Navratilova both have 20 Wimbledon titles.
Rodger Federer has won the most tennis titles.
Martina Navratilova and Billie Jean King have both won a record 20 Wimbledon titles.
The man who won the most tennis titles is Jimmy Connors; won 109 and woman who won the most titles is Margaret Court; won 192 singles titles.
Bjorn Borg was a tennis player from Sweden, formerly No. 1 in the world in men's tennis. Borg won 11 Grand Slam singles titles from 1974 to 1981, including five consecutive Wimbledon titles and six French Open titles.
That would be Margaret Court, but seven of those wins were before 1969, and the advent of professional tennis players.
Margaret Court has 24 individual Grand Slam titles. Roger Federer has the most individual Grand Slam Titles of any male tennis player at 16.