Taller height might be an advantage on tennis court

Taller players, with their better angles and higher contact point, can afford to use more of the explosive, throw-like technique and still land the ball within the service square of their opponent. Shorter players often need to use a more controlled motion to ensure their serves stay in play

Joondalup: We’re nearing the halfway point of this year’s Australian Open and players like the United States’ Reilly Opelka (ranked 170th in the world ) and France’s Giovanni Mpetshi Perricard (ranked 30th) captured plenty of attention despite early-round exits.

These two players caught the eye of the tennis world for not only their towering height (standing 2.11 metres and 2m respectively) but their thunderous serves. Players of this height don’t just stand out in the players’ lounge – they enjoy a significant advantage on court.

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But why exactly does being tall help create those blistering serves? The answer lies in some fascinating physics and biomechanics.

The numbers don’t lie

The connection between height and serving power isn’t just something we imagine – analyses of Grand Slam tennis players show our eyes aren’t deceiving us.

The fastest server of all time might be considered relatively short – Australia’s Sam Groth stands “only” 1.93m – but served an ace at a blazing 263.4 kilometres per hour during an ATP Challenger event in Busan in 2012.

The rest of the top five fastest servers in men’s tennis history, and eight of the top ten, all stood at more than 2m tall. In women’s tennis, the findings also hold true, with Spain’s Georgina Garcia Perez (1.88m) holding the record at 220km/h. And four of the top five fastest were at least 1.82cm – Sabine Lisicki (Germany) is the shortest at a still above average height of 1.78cm.

The physics behind the power

So what makes height such an advantage for serving? Among many factors, three are critical. First, taller players generally have longer arms, which act like speed amplifiers.

In physics terms, the speed of your hand (and therefore the racquet) is approximately equal to the length of your arm multiplied by how fast you rotate it, as shown in the figure below. Longer arms equal faster racquet speeds.

Of course, you might imagine that longer arms would be heavier and therefore harder to move quickly. While that’s true for legs (which is why most of the world’s fastest sprinters aren’t super tall), arms are relatively light. The speed advantage of length wins out over any minor weight penalty.

A better angle of attack

The second advantage is all about geometry. Taller players can hit the ball at point higher off the ground, so it’s easier to clear the net and yet still get the ball to land in the service square on the opposite side of the court.

Taller players can hit powerful serves on a downward angle that clears the net but still lands inside the opponent’s service line. This height advantage also means a taller athlete can serve powerfully to any part of the service box, not just over the lowest part of the net down the centre of the court.

A shorter player has to be much more precise with their angle to achieve the same effect and usually has to hit their fastest serves down the court’s centre. In tennis serving, angles matter.

Technique: the freedom to swing free

The third advantage might be the most interesting: taller players can actually use more aggressive serving techniques because they have more room for error. Tennis serves use what’s called a “throw-like pattern”. This is a complex sequence starting from the legs, rotating through the body, and ending with a whip-like motion of the arm and racquet. This movement pattern can generate enormous power but it’s also harder to control.

That is, the technique we use for speed is different from the technique for accuracy. Taller players, with their better angles and higher contact point, can afford to use more of the explosive, throw-like technique and still land the ball within the service square of their opponent.

Shorter players often need to use a more controlled motion to ensure their serves stay in play – they have less room for error so they need to use a more conservative, but accurate, serving technique.