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New tennis balls are considered fresh and not "flat". Old tennis balls exposed to play and air become flat and do not perform normally in a match.

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Q: Why do you use new tennis balls and not old tennis balls?
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Related questions

Why do you use tennis balls?

To play tennis.

What physical property can we use to separate tennis balls from rocks?

The density of tennis balls is approx. 0,38 g/cm3 an can float on water.

When did Wimbledon first use yellow tennis balls?

Yellow tennis balls replaced white tennis balls because the Lawn Tennis Association decided that the white balls were difficult to see. You can still buy white balls nowadays at, which is the leading modern and easiest seller for white tennis balls for sale to reach in America and internationally. According to, the first use of yellow tennis balls was in 1986 to make easier viewing on television. Wilson has always been making the white balls for lawn tennis which can be ordered online occasionally. But before the company started selling in 2007, the white ball market was shut down for decades for most common use and is still quite rare. The only tennis balls that can be used in professional tennis is the neon and white, so it technically hasn't been changed within the rules of tennis.

Are tennis balls safe for puppies?

not for puppies, they use them for big dogs, if u want a tennis ball for youre puppy go to a pet store and buy special tennis balls

What is a use for aegirine?

glass, magnets, Tennis balls & blackboards

What do you use a table tennis ball for?

Cracked table tennis balls can be used for vehicular antenna-toppers.

What can you substitute for tennis balls?

you can also use a big rubber ball

How much of these kinds of things will be sold?

Tennis balls are very useful for more than just tennis. Old people put them on their walkers, and people throw them to their dogs. But tennis players use them for, well, tennis. I think the biggest market would be rackets and re-stringing them.

When do you open a new can of tennis balls in a game?

after 9 games then after 11 games then 9 games then 11 and so on

What are some good gift ideas for a beginner tennis player?

A new tennis player can use a racquet, a sleeve of tennis balls, a gift certificate for some lessons, a tennis outfit, and more. Even some rented time on a court with an opponent to practice and play is a great idea!

When was the pressureless tennis ball invented?

According to Gamma Sports the very first tennis balls were pressureless tennis balls and were created in the 1860's as a result of the recent discovery of vulcanization. It wasn't until 1922 that Penn created the pressurized tennis ball that we use today.

Why are tennis balls used to play tennis?

tennisballs are used to play tennis because if u use gollfball the ball would not go back and forth and if u use a basketball it would be to big.