Shouting can boost performance!
Studies conducted in several countries show that shouting can boost performance. Before hitting the ball, athletes hold their breath and their chest. That's why shouting releases the accumulated energy and increases the striking force by 4 to 10%, which is significant! It's no wonder they shout so loudly.
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To destabilize your opponent and boost your motivation
This also helps to destabilize the opponent, as yelling extends the opponent's reaction time by concealing the racket hit. Smart move... The yell is also a source of motivation for the one making it. It's a way to motivate yourself. Some tennis players even say that if they lose the match but yelled a lot, they give the impression of having put up a good fight. In the end, tennis is more aggressive than we thought!