Re: Why do tennis fans accept lesbian tennis stars yet no one in ATP out of closet?
It's because straight women generally are more accepting than straight men are of gay people. The men's locker room would be much more hostile to a gay man than the women's locker room would be/is to a lesbian. Plus, I do think there probably are more lesbians on the tennis tour in general than there are gay men.
All this, especially first sentence. Really big part of tennis audience is middle-aged men, probably least accepting part of demography (not counting older ppl).