What is the difference between a tennis ball and a padel ball?

The difference between a tennis ball and a padel ball

They look similar. They feel comparable. But a tennis ball and a padel ball are not interchangeable. The difference lies in the size, the internal pressure, the playing behaviour and the effect on your body. Anyone who plays padel with tennis balls notices the difference immediately, and not in a good way.

Size and pressure

A tennis ball has a diameter of 6.54 to 6.86 centimetres. A padel ball is slightly smaller: 6.35 to 6.77 centimetres. The internal pressure of a padel ball is around 10 to 11 PSI. For a tennis ball that is approximately 14 PSI. That lower pressure is deliberate: on a padel court with glass walls and a smaller playing area a tennis ball would be too fast and too uncontrollable.

The playing difference on the court

The lower pressure of a padel ball produces a lower bounce and a slower ball pace. That enables longer rallies, gives more time to position and places the emphasis on tactics and placement rather than speed and power. A tennis ball bounces too high on a padel court, comes back too fast off the glass and makes the game uncontrollable.

We regularly see it with players who play padel for the first time and accidentally bring tennis balls. The ball flies away, rallies last two shots at most and the fun is hard to find. The game dynamics simply do not work with a tennis ball.

The injury risk most players do not know about

This is the part most articles skip. A ball that loses pressure too quickly or is already soft before you start playing demands compensation. You hit harder to get the same result. That extra force goes directly to your elbow and wrist. Players who regularly play with soft balls, whether those are used padel balls or tennis balls, run significantly more risk of padel elbow (lateral epicondylitis).

A fresh padel ball with the correct pressure gives the ball enough energy to come off the face without you needing to provide that force. That is what the ball is supposed to do. Once that pressure drops, you take over. And that is when the overload begins.

How to test if a padel ball is still good

The simplest test: drop the ball from hip height onto a hard surface. A fresh padel ball bounces back to roughly knee height. A soft or dead ball barely bounces back. Once you notice you are hitting harder to get the same result, the ball is probably too soft.

Rule of thumb: after two to three sets of intensive play a padel ball is noticeably softer. For optimal performance and arm protection, replace a can after two to three sets.

Storage makes a difference

A padel ball loses pressure as soon as the can is opened. But even unopened cans are sensitive to extreme temperatures. Store cans at room temperature, not in a hot car or cold shed. After opening, store balls in a ball pressure keeper that maintains pressure at playing level. Independent tests show that balls in a pressure keeper stay ready to play three to five times longer.

Can I use tennis balls for padel?

No. The higher pressure, larger size and different playing behaviour of a tennis ball make the game unworkable on a padel court. It is not a matter of preference but of game dynamics: the ball bounces too high, comes off the walls too fast and gives virtually no control. Always use official padel balls.