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9 Reasons why Tennis Players grunt

What's as loud as a chainsaw, a helicopter or a lion's roar and provokes thousands of heated conversations across tennis?

There are few more controversial subjects in tennis, or in all professional sport, than grunting. It's sometimes said that Jimmy Connors is "the father of the tennis grunt", and that he invented grunting in the 1970s, and with every generation of players since the subject hasn't become any less divisive.

Grunting doesn't help players win any popularity contests, with fans often muting their televisions so the noise doesn't spoil their enjoyment of the match. It's also not unusual for players to complain to umpires about the sound coming from the other end of the court. Maria Sharapova and Monica Seles spent far more time talking about grunting during their careers than they would have liked.


Why then do tennis players grunt? 

#1 - More power

Scientists have established a clear link between grunting and power, with studies showing that those who make some noise hit their groundstrokes 3.8 per cent faster than those who stay silent. And the benefits of grunting are even bigger when serving - grunters serve 4.9 per cent faster than players who are quiet. It seems that it's easier to make more physical effort when you're letting out a loud noise as you do it. Those numbers suggest that instead of posing the question, ‘Why do tennis players grunt?’, you might ask of those who are silent: ‘Why don’t they?’


#2 - Distracting an opponent 

You could drive your opponent crazy, who might lose their focus and concentration. 


#3 - Slowing down an opponent's reaction time 

You might not realise it, but you use sound to gauge how hard your opponent hits the ball, and also the direction of the shot. If they're grunting loudly, and you can’t hear the sound of the ball on the racquet, that affects your ability to judge the shot. Studies have shown that when their opponents are grunting, tennis players are between three and four per cent worse at assessing where the ball is heading and at what speed. One study suggested that players take 30 milliseconds longer to react. That might not sound like much, but in that time the ball has probably travelled around half a meter through the air. 


#4 - Confusing an opponent 

One devious trick is to let out a huge grunt, as if you've hit an enormous topspin forehand that took a lot of effort, but then throw in a gentle drop-shot. Your opponent won't be expecting that. As Caroline Wozniacki once said: ‘If you grunt really loudly your opponent cannot hear how you hit the ball. Because the grunt is so loud, you think the ball is coming fast and suddenly the ball just goes slowly.’


#5 - Releasing tension 

From Andre Agassi to Monica Seles to Maria Sharapova, some of the biggest grunters in tennis history learned the game at the Nick Bollettieri academy in Florida. It's interesting to note that Bollettieri says grunting allows for a "psychological and physiological release of tension". 


#6 - Improving breathing and rhythm 

Grunting can help with the timing of your shot, with Bollettieri saying the noise “synchronises breathing precisely with hitting the ball”. 


#7 - More confidence 

Psychologists have suggested that grunting helps a player to feel more assured of themselves on court, which will allow them to produce better tennis. 


#8 - Habit – they just can’t help themselves

As a grown woman, Sharapova's grunts have exceeded 100 decibels, which might make her the loudest grunter of all time, though there is no official record. She used to say that grunting was just something she had done since a young age. It was part of her tennis technique. Trying to stop grunting when she was in her twenties would have been as challenging as trying to hold the racquet with a new grip. It was always fascinating, though, to listen to her practice sessions, when she would be completely silent; she only grunted when she was playing matches. Seles has said she grunted from the age of eight, and that she didn't suddenly start as a pro.


#9 - Players copy each other 

Just like every other aspect of tennis, younger players look at the elites and want to emulate what they're doing. If grunters are winning Grand Slams, children and teenagers are also going to make some noise. When that generation then reaches the top of the sport, the cycle begins again. 


Should grunting be allowed in tennis? 

Martina Navratilova is among those who have taken a hard line about grunting - she has called it "cheating, pure and simple". Others suggest grunting’s part of the game, while others argue it's turning off casual fans.


While professional players can be punished for grunting if the umpire believes they're deliberately trying to put off their opponents, that hardly ever happens. Sharapova has said in the past that she would be supportive of tennis taking a stronger stance against grunters, but that they should be educating younger players. Once you've been grunting for years, Sharapova was saying, it can be very hard to press mute. It seems that grunting is here to stay in tennis. So, too, is the debate about grunting. 


One thing to listen out for. Scientists have suggested that the pitch of a tennis player's grunt gives some clues as to whether they are going to win or not. The lower the pitch, the more likely a player is on the way to victory. When you hear someone doing high-pitched grunts, there’s more chance they’re going to be the loser. 

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