55 year old Bobby Riggs defeated Margaret Court (#1 in the world at the time - current (not Serena) holder of the most singles and overall Grand Slam les) 6-2, 6-1 in the 1st Battle of the Sexes. In the VERY highly publicized 2nd Battle of the Sexes, Billie Jean King (age 29) beat Riggs in 3 sets.
Nineteen years later, a third "Battle of the Sexes" match, en led Battle of Champions, was played in 1992.[37] Outdoors at Caesars Palace in Paradise, Nevada, it matched 40 year-old Jimmy Connors and Martina Navratilova, age 35. A pay-per-view telecast,[37][40] the match was played on Friday night, September 25,
under hybrid rules to make it more compe ive; Connors was allowed only one serve per point, and Navratilova was allowed to hit into half of the doubles alleys.[37][40] Score was still 7-5, 6-2 Connors.
Women cannot compete on an even field with men in tennis - the physical advantage is too great.
https://en.wikipedia.org/wiki/Battle...Sexes_(tennis)