I once did a cyclocross race with the then-current women’s US national champion, she entered the men’s masters race as a warmup before the pro women’s race. This was when I was in the best shape of my life. She lapped me. I tried for like 5 seconds to stick to her wheel before giving up.
I wrote a thread about this in tennis a while ago - that professional men's tennis players could destroy serena means nothing at lower levels, I was a mediocre varsity tennis player and absolutely could not hang with a decent women's college tennis prospect