The world's nine highest-earning sportswomen over the past year are all tennis players, according to research by US business magazine Forbes.
Naomi Osaka still feels bittersweet about her U.S. Open victory. Photo: Photosport
Japan's Naomi Osaka tops the list with earnings of $US37.4m, ahead of Serena Williams with $US36m.
World number one Ashleigh Barty is third with income of $US13.1m.
United States international footballer Alex Morgan is the only athlete from outside tennis in the top 10, earning $US4.6m.
Morgan, who gave birth to her first child in May, earned $US4.2m of her income through endorsements during the span of Forbes analysis - between 1 June 2019 and 1 June 2020.
The US women's team, winners of the Women's World Cup in July 2019, are currently in dispute with their federation, appealing against a judge's decision to reject their claims of being underpaid compared with the US men's team.
Osaka and Williams have both broken the previous record for annual earnings, set at $US29.7m in 2015 by Russian tennis player Maria Sharapova.
In a list of the world's 100 best-paid sportspeople published by Forbes in May, Osaka (29th) and Williams (33rd) were the only women.
Top 10 highest-earning sportswomen
1 Naomi Osaka Tennis $US37.4m
2 Serena Williams Tennis $US36m
3 Ashleigh Barty Tennis $US13.1m
4 Simona Halep Tennis $US10.9m
5 Bianca Andreescu Tennis $US8.9m
6 Garbine Muguruza Tennis $US6.6m
7 Elina Svitolina Tennis $US6.4m
8 Sofia Kenin Tennis $US5.8m
9 Angelique Kerber Tennis $US5.3m
10 Alex Morgan Football $US4.6m
*Between June 2019 and June 2020, according to Forbes.
-BBC