Osaka is the world's highest-paid female athlete

Japanese tennis star Naomi Osaka has become the world's highest-paid female athlete, displacing US rival Serena Williams at the top of the list.

According to Forbes magazine, Osaka, a two-time Grand Slam champion, made 30.7 million pounds in prize money and endorsements over the past 12 months.

That was 1.15 million pounds more than the amount earned by 38-year-old Williams.

Both shattered the previous single-year earnings record of £24.4m set in 2015 by Russia's Maria Sharapova.

Since Forbes began tracking women athletes' income in 1990, tennis players have topped the annual list every year.