Twenty-two-year-old Osaka earned $ 3.74 billion (approximately $ 284 crore) in prize money and sponsorship last year. In the same period, Serena earned $ 3.60 billion (about Rs 273 crore).
Osaka surpassed tennis star Maria Sharapova’s record $ 2.97 billion in 12 months. In 2015, Sharapova won.
English Summary: Tennis: Osaka world woman number one