system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do many top female tennis players make long squealing noises during play?

OK I will get this out of the way. The noises they make in many cases sound very sexual. I don't mean enticing or arousing, but a little unsettling as if I am hearing something I shouldn't. 

If this the female equivalent of the grunt of effort male players sometimes makes that seems weirdly gendered.
gpt
It can be a release of energy. They hold their breathe, tense up to get more power into the shot then all of the stored energy is released (exhaled). Sometimes with a grunt or a squeal. 

A lot of the time it's just habit and annoying though.