Not at all, Why should it be, when people in other sports cry out or grunt or whatever. Anyway, the thwack of the balls off the racket can be as loud as the grunts.
It isn`t meant to throw off the opponent.
Grunting in tennis refers to the loud noise, sometimes described as "shrieking"or "screaming", made by some players during their strokes In male grunting was started by Jimmy Connors and in female grunting was started with Monica Seles
Its not just Russian tennis players who grunt; they do it all around this crazy grunting world. But tennis players grunt because they want to distract the opponent from hearing the ball being hit
A fault.
Grunting is a simple vocal tic
As I walked by, I heard the pigs grunting,
grunting for sure, it requires more muscles to do.
Wild boars are known to make grunting sounds at night.
a whale makes a grunting sound
If you mean by hitting the ball twice, then yes.
You can go to the Isohunt web site and search for virtual tennis 3 there and then download it easily.
If you step on the white line in front of you while serving, it is illegal, its called faulting
it is because the Glottis briefly stops the air flow. that causes the air to get out hardly and causes the grunting sounds.