The sport is of course no stranger to a spot of gratuitous grunting, but shit got properly primal during the recent Sarasota Open match between Francis Tiafoe and Mitchell Krueger.
The commentators initially assume it's a spectator enjoying some porn on their phone, before beginning to wonder if a pair of horny lovers might actually be getting down to it in the stands. Turns out the 'commotion' is in fact coming from an apartment on the other side of a lake! Some doing, that. Fair fucks to those guys.
Check the video.