Why Are Tennis Balls Vacuum Sealed?

Why Are Tennis Balls Vacuum Sealed? Well, the term is technically incorrect. The tennis balls are sealed but not “vacuum sealed.” The balls are sealed with a certain amount of pressure inside to ensure decent performance. The same thing goes for tennis ball cans.  

The tennis balls need to be bouncy. The specific pressure inside the ball ensures the bounciness of the ball. In general, the balls include 15 PSI inside pressure. The can is also sealed at the same pressure to keep the pressure of the ball intact. 

The Science Behind the Sealing of The Tennis Balls

A variety of sports, including football and volleyball, use pressurized balls. However, tennis balls are different as there are no ways to pump them. Tennis balls packaged in an airtight can to keep the inside pressure of the ball undamaged. The cans are also sealed in the same inside pressure as the ball.

As a result, when you remove the balls from the can, their lifespan becomes limited. Even if you don’t play the ball, it will become dead after a few weeks due to the outside and inside pressure inconsistency.  Besides, playing with the balls will deflate them quickly.

Because of such properties, the tennis balls are recommended not to open unless you are playing.

Why Are Tennis Balls Can Vacuum Sealed?

Tennis balls usually come in a sealed canister, which is identical to the drink cans. But why do they seal tennis balls? As we mentioned earlier, the tennis ball cans are not vacuum sealed. Instead, they are sealed under the same pressure as the balls. The pressurized air keeps the inside pressure of the balls intact.

Usually, tennis balls sealed pressure is around 14 PSI. So, the tennis balls can also have the same pressure.

Why Are Tennis Balls Vacuum Sealed?

How long does an unopened can of tennis balls last? Just because the balls are stored in a sealed can, they will not last forever. The can’s air pressure will leak over time, and that’s why they arrive with an expiry date. Typically, an intact tennis ball can last around two years.

Pressureless Tennis Balls vs Pressurized Tennis Balls

The standard tennis balls are pressurized, as we discussed above. However, while shopping the tennis balls, you may come to know about pressureless tennis balls. As the name suggests, the balls are pressureless and feel dead as right out of the package. The balls are typically made of rubber materials.

The surface of the balls becomes softer after using them for a while. As a result, they become bouncy like the pressured balls. They arrive with a long-term lifespan. While the properties of the ball sound appealing, they are actually not. The balls are pretty heavy and require more effort to play.

The balls also increase the chance of injuries. They also don’t spin well, like the pressurized balls. Compared with the pressurized balls, the other variation may be affordable but not a suitable choice for a decent performance. That’s why professional players do not prefer pressureless tennis balls.


We hope the write-up will help you to understand why tennis balls and cans are sealed. If you have any questions regarding the article, please let us know through comment.

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