The top 11 highest-earning female sport athletes over the past year are all Tennis players.
US World Cup-winning striker Alex Morgan is the first non-Tennis player at 12 after earning $5.8m (£4.77m).
Osaka’s rise up the Tennis world rankings following her debut Grand Slam win, which took the 21-year-old to number one, and earned her a lucrative sponsorship deal with Nike, with her earnings growing to an estimated $16m (£13.14m) in the past 12 months.
|Top 15 highest-earning female sports stars|
|Name||Total earnings||Prize money/salary||Endorsements|
|Serena Williams||£24.3m ($29.2m)||£3.45m ($4.2m)||£20.57m ($25m)|
|Naomi Osaka||£20m ($24.3m)||£6.8m ($8.3m)||£13.14 ($16m)|
|Angelique Kerber||£9.71m ($11.8m)||£4.85m ($5.3m)||£5.34m ($6.5m)|
|Simona Halep,||£8.39m ($10.2m)||£5.09m ($6.2m)||£3.2m ($4m)|
|Sloane Stephens||£7.90m ($9.6m)||£3.36m ($4.1m)||£4.59m ($5.5m)|
|Caroline Wozniacki||£6.17m ($7.5m)||£2.87m ($3.5m)||£3.2m ($4m)|
|Maria Sharapova||£5.76 ($7m)||£823k ($1m)||£4.92m ($6m)|
|Karolina Pliskova||£5.18 ($6.3m)||£3.77m ($4.6m)||£1.39m ($1.7m)|
|Elina Svitolina||£5.02m ($6.1m)||£3.77m ($4.6m)||£1.2m ($1.5m)|
|Venus Williams||£4.84m ($5.9m)||£739k ($900k)||£4.1m ($5m)|
|Garbine Muguruza||£4.84m ($5.9m)||£1.97m ($2.4m)||£2.87m ($3.5m)|
|Alex Morgan||£4.77m ($5.8m)||£205,416 ($250k)||£4.51m ($5.5m)|
|PV Sindhu||£4.53m ($5.5m)||£410,833 ($500k)||£4.1m ($5m)|
|Madison Keys||£4.53m ($5.5m)||£2.04m ($2.5m)||£2.46m ($3m)|
|Ariya Jutanugarn||£4.35 ($5.3m)||£2.7m ($3.3m)||£1.64m ($2m)|
*All amounts are estimates