Who was the first woman named "Sportswoman of the Year" by "Sports Illustrated"?

CharlieHustle, Bobby Riggs was the ultimate chauvinist who swore he could beat her, a woman, even though she was much younger and in her prime. I believe it was planned as a stunt but after they started playing, their competiveness kicked in.

CharlieHustle, As Player Say What points out it was a game sparked by Riggs’ challenge . Hoist with his own petard

She was great, but beating Bob Riggs when she's at the top of her game and he's 55 really isn't an accomplishment so much as it was a PR stunt. He was winded and struggling after the second game. It would be like Venus Williams of 2016 beating John McEnroe of 2016. Father Time ends all careers eventually but tends to get athletes earlier.

never heard about this female tennis player