Round-Up: Osaka the highest-paid female athlete, Japanese baseball restart, NRL-Betfair deal, and more

Naomi Osaka of Japan returns a shot against Jessica Pegula of the United States during women's singles first round match of 2019 China Open at the China National Tennis Centre. (Photo by Lintao Zhang/Getty Images)

Japan's Naomi Osaka was the world's highest-paid female athlete last year, according to Forbes, earning $37