She stepped away from the game and came back stronger, winning four tournaments this year, including Wimbledon.
In a year when mental health has often been a headline in sports, it is fitting that Ash Barty of Australia is the No. 1 women’s player in the world. Barty had the self-awareness to walk away from tennis for more than a year in 2014 to seek a more normal existence (though she also took up professional cricket).