Female tennis champion of the world, beaten by average man.
I would not say Nick Kyrgios is an average man. Kyrgios has been ranked as high as 13th in the world, and has won 63.7% of his professional matches. He went to the Wimbledon final against Djoko three years ago, and has been to the quarterfinals in the Australian and U.S. Open.
Now, Karsten Braasch was more of an average pro. He did get as high as #38 in 1994, and had a losing record overall. A journalist once said his training regimen was a couple lagers and a pack of cigarettes. In 1998, at 31, when he was ranked #203, he been 17-year-old Venus Williams 6-2, then Serena Williams 6-1.
The Williams sister were more realists. Before that match, thwey had claimed they could bet any man outside the top 200. Turns out they couldn't but it wasn't like they were claiming they could beat any man.
And they've been very honest since then that they would get lobbered by a man. Honestly, a woman using a power game would probably do worse against a man than someone like Eva Goolagong.
My mother was a much better tennis player than my father, but she couldn't beat him, because of the power.
She could beat him, or anyone else, at Ping-Pong though.