Serena Williams tops Forbes' list of highest-paid female athletes for fourth consecutive year.

Serena Williams is Forbes' highest-paid female athlete for the fourth year in a row after she earned $29.2million in just 12 months.

The 23-time grand slam singles champion made 29.2 million US dollars for the 12 months to June 1, only £3.4m dollars of which was in prize money.

Young Japanese tennis star, Naomi Osaka, 21, who benefited from lucrative endorsements as well as prize-winning pots this year made $24.3 million.

Next on the list is Germany's Angelique Kerber who made £9.7m ($11.8m) this year. 

The highest-placed athlete from anothqer sport was United States footballer Alex Morgan in 12th. She earned £4.75m ($5.8m) US dollars and all of the money was made through endorsements.

SEE THE FORBES TOP 15 EARNERS

1. Serena Williams (tennis)

Total Earnings: £24m ($29.2m)

Prize Money: £3.4m

Endorsements: £20.5m

2. Naomi Osaka (tennis)

Total Earnings: $24.3 million

Prize Money: $8.3 million

Endorsements: $16 million

3. Angelique Kerber (tennis)

Total Earnings: £9.7m ($11.8m)

Prize Money: £4.3m

Endorsements: £5.4m

4. Simona Halep (tennis)

Total Earnings: £8.4m ($10.2m)

Prize Money: £5.1m

Endorsements: £3.3m

5. Sloane Stephens (tennis)

Total Earnings: £7.9m ($9.6m)

Prize Money: £3.3m

Endorsements: £4.5m

6. Caroline Wozniacki (tennis)

Total Earnings: £6.2m ($7.5m)

Prize Money: £3.3m

Endorsements: £2.9m

7. Maria Sharapova (tennis)

Total Earnings: £5.8m ($7m)

Prize Money: £825K

Endorsements: £4.9m

8. Karolina Pliskova (tennis)

Total Earnings: £5.1m ($6.3m)

Prize Money: £3.8m

Endorsements: £1.4m

9. Elina Svitolina (tennis)

Total Earnings: £5m ($6.1m)

Prize Money: £3.8m

Endorsements: £1.2m

10 (tie). Venus Williams (tennis)

Total Earnings: £4.8m ($5.9m)

Prize Money: £740K 

Endorsements: £4.1m

10 (tie). Garbine Muguruza (tennis)

Total Earnings: £4.8m ($5.9m)

Prize Money: £1.9m

Endorsements: £2.8m

12. Alex Morgan (football)

Total Earnings: £4.7 ($5.8m)

Salary: £205K 

Endorsements: £4.5m

  

13 (tie). P.V. Sindhu (badminton)

Total Earnings: £4.5m ($5.5m)

Prize Money: £500K 

Endorsements: £4.1m 

13 (tie). Madison Keys (tennis)

Total Earnings: £4.5m ($5.5m)

Prize Money: £2.5m

Endorsements: £2m

15. Ariya Jutanugarn (golf)

Total Earnings: £4.4m ($5.3m)

Prize Money: £3.3m

Endorsements: £2 million