The 10 biggest earning women athletes - including Maria Sharapova
Who were the biggest earning women athletes in 2015, according to the Forbes rich list? Here's the top 10
10. Agnieszka Radwanksa - £4.2m
Won the WTA Tour finals after bouncing back into the world's top five and reaching the semi-finals of Wimbledon.
9. Stacy Lewis - £4.5m
The American golfer failed to win an LPGA event in 2015 but still represents one of the biggest earners in women's sport.
8. Ronda Rousey - £4.5m
The UFC champion made it six wins out of six and dabbled in WWE wrestling before she was surprisingly defeated by Holly Holm last November. Still the biggest earning women's fighter in UFC.
7. Simona Halep - £4.8m
The Romanian tennis player eached the quarter-finals of the Australian Open and semi-finals of the US Open.
6. Petra Kvitova - £5.4m
Not as successful in 2015 as she had been the previous year, although she was runner-up in the WTA Tour Finals.
5. Ana Ivanovic - £5.8m
Made a return to form, of sorts, by reaching the semi-finals of the French Open. Still earns far more from commercial activities than prize money.
4. Danica Patrick - £9.8m
Still a flagbearer for women in motorsport, even if she did not hit the heights of previous years in 2015.
3. Caroline Wozniacki - £10.3m
A sort of Ivanovic-lite, in that the days when she was immovable at the top of the world rankings and clocked up multiple tour wins appear behind her. Failed to make it past the fourth round of a grand slam but still racks up endorsements.
2. Serena Williams - £17.3m
Maintained her vice-like grip on women's tennis in 2015, winning three of the four slams and losing the other - the US Open - at the semi-final stage. Shows little sign of slowing down, although she did lose the final of the Australian Open in surprising fashion to Angelique Kerber.
1. Maria Sharapova - £21m
The Queen of all things commercial in women's sport, at least until her doping revelation in Los Angeles on Monday night. Sharapova reached one slam final (in Australia) and the semis of another (Wimbledon) in 2015 but still raced clear of her rivals when it comes to earning power. Endorses everything from sportswear to sugary sweets, and has a bank balance to prove it, but this scandal will test that commercial strength to the limit. One of her sponsors, Nike, have already suspended their relationship with her while the investigation into her conduct is ongoing.