Margaret Court
Margaret Court, she won 24 Grand Slams in her life.
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.
For woman's tennis it is Serena Williams. For men's it is Rodger Federer. Serena has the most with 29 grand slam titles.
Maria Sharapova recently achieved this by winning her 4th major title at the French Open.
Serena Williams
Steffi Graf won four Australian Open titles, five U.S. Open titles, six French Open titles, and seven Wimbledon titles for a total of 22* grand slam titles. * It should be noted that Margaret Court Smith holds the record for Grand Slam victories with 24 wins
She was a woman tennis player and she beat Bobby Riggs, a man tennis player.
Billie Jean King
5'9
Margaret Court
Venus Williams.