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Photo: Fred Lee/Getty Images

Japanese tennis star Naomi Osaka, 22, has become the highest-paid female athlete in history after raking in $37.4 million last year, Forbes reports.

Why it matters: Pay disparities for women in professional sports have drawn attention in recent years, especially after U.S. women's national soccer team accused the U.S. Soccer Federation of "institutionalized gender discrimination" in 2019. Professional female athletes also told "Axios on HBO" in March that the fight for equal pay has a long way to go.

  • Osaka earned her millions through game winnings, endorsement partners and apparel deals.
  • She came in at No. 29 on Forbes' "Top 100 highest-paid athletes" list, overtaking fellow tennis pro Serena Williams, who earned $36 million last year and came in at No. 33 on the list.

Go deeper

The fleeting facade of amateurism in college sports

Illustration: Sarah Grillo/Axios

If football and men's basketball players at Power 5 colleges were paid under collective bargaining agreements like their professional peers in the NFL and NBA, they would earn annual salaries of $360,000 and $500,000, respectively.

Driving the news: That's according to a new study released by the National Bureau of Economic Research, which also estimates that high-profile athletes like quarterbacks ($2.4 million per year on average) and every starting player on a basketball team (between $800,000 and $1.2 million per year) would earn significantly more.

Biden Cabinet confirmation schedule: When to watch hearings

Joe Biden and Kamala Harris on Jan. 16 in Wilmington, Delaware. Photo: Angela Weiss/AFP via Getty Images

The first hearings for President-elect Joe Biden's Cabinet nominations begin on Tuesday, with testimony from his picks to lead the departments of State, Homeland and Defense.

Why it matters: It's been a slow start for a process that usually takes place days or weeks earlier for incoming presidents. The first slate of nominees will appear on Tuesday before a Republican-controlled Senate, but that will change once the new Democratic senators-elect from Georgia are sworn in.

Kamala Harris resigns from Senate seat ahead of inauguration

Vice President-elect Kamala Harris. Photo: Mason Trinca/Getty Images

Vice President-elect Kamala Harris submitted her resignation from her seat in the U.S. Senate on Monday, two days before she will be sworn into her new role.

What's next: California Gov. Gavin Newsom has selected California Secretary of State Alex Padilla to serve out the rest of Harris' term, which ends in 2022.