#1 Venus Williams

The only player in tennis history to win Olympic medals in 4 different Summer Olympic Games, big-serving American Venus Williams has been a mainstay of Women's tennis for close to two decades.
Venus Williams has won 7 Grand Slam Singles titles, 14 Grand Slam Doubles titles, 2 Mixed Doubles titles and 5 Olympic medals of which 4 are Gold. With regard to prize-money earned, she is second only to her younger sister Serena Williams.
Making her first Grand Slam Singles appearance at the 1997 French Open, Venus has appeared in a record 80 Grand Slam tournaments which is the highest among Men and Women.
Venus Williams and Father Richard recall one match that 7-time Grand Slam champion "should have won"