4. Maria Sharapova – Tennis
Maria Sharapova is often considered one of the greatest female tennis athletes of all time. She became world No. 1 when she was only 18. Even if she was suspended for two years due to a positive doping test, Sharapova did win 36 single’s titles, including five on Grand Slams. She won the French Open for three times and Australian Open, Wimbledon and US Open once each.