In Sweden, quite a few female athletes are out. Among them Anja Pärsson
(alpine skiing), Kajsa Bergqvist
(high jump) and at least a fifth of the national soccer team, past and present. The reaction when a female athlete comes out is "OK, so what?" among the general population, and the more misogynist crowd goes "I knew it! All women who do something as manly as sports are really
gay, you know."
I played soccer up until I was sixteen, and while the environment in the girls' team I was on wasn't exactly gay friendly, it wasn't hostile either. Same for riding horses and hanging out in the stable that was the center of a club with 800 members at the time, which I did until I was 21.
On the male side, I don't know of any who's at the very top and out. There has been like one or two a tier or two down, but that's it. From what those who are out have said, it's not because top male athletes necessarily hide who they are, it's that non-straight guys drop the whole thing in their teens when the rampant homophobia among coaches and teammates becomes so prevalent that they have to choose between their sport and their sanity.
Going back to the sports clubs I was in as a teenager, a gay guy riding horses would most likely have been accepted, it was just that there were so few male members at all that no one being openly gay was still within the usual statistics. An openly gay guy in the soccer club? No, just no.
read fluently, understand well, speak badly;
read fluently, understand badly, can't speak;
read some, understand a bit, speak a few sentences;
heritage language, want to understand and speak but can't.