If you play on a clay court surface, you need Regular Duty tennis balls. … Regular duty tennis balls have a thinner felt that is woven tightly around the ball’s core. This means that clay cannot penetrate the felt and will not cause the ball to puff up, preserving its integrity over time.
Then, what is the difference between regular duty and extra duty tennis balls?
Regular duty balls: meant for soft clay courts, and indoor courts. They have a softer felt but do not last as long on hard courts. Extra duty tennis balls: meant for hard-courts. The felt on the ball is woven with more wool to help withstand harder courts, and making them last longer.
Moreover, what is the difference between high altitude tennis balls and regular tennis balls?
‘High altitude’ tennis balls have diameters that are about 6% larger than ‘low altitude’ tennis balls. The reason for this is because at high altitudes, the air pressure is lower. … Since less air pressure would mean less air resistance, they compensate by making the balls bigger.
How long do extra duty tennis balls last?
So how long do tennis balls really last? Tennis balls will go bad after about 2 weeks or 3-4 playing sessions. Unopened tennis balls are kept in a pressurized tube to help them retain bounciness and firmness, but even those will expire after two years (due to very tiny leaks).
What do numbers on tennis balls mean?
Tennis balls have numbers printed on them so players can distinguish their balls from balls coming from another court. Most people play tennis in an area where people are playing on adjacent courts, and it is very possible that more than one court might be using the same brand and type of ball.
How much money does a tennis ball boy make?
Every year, 400 to 500 individuals try out to become one of 250 ball boys or girls for the U.S. Open. The starting salary for this position is $7.75 per hour, as of the date of publication. Raises are given each year to returning individuals, and no age limit exists for ball boys or girls.
Why are tennis balls kept in the fridge?
Throughout history, fridges have been deployed at the side of courts to maintain the consistency of bounce in every ball while they’re waiting to be used. The 53,000 balls used at the tournament will be kept at 20 degrees until it’s their time to shine.
What tennis balls are good for clay courts?
Regular-duty tennis balls are ideal for gameplay on soft clay and indoor courts. The thinner felt of regular-duty tennis balls makes them absorb less clay on impact, but it also means they won’t last as long if you play with them on hard courts.
Are Wilson or Penn tennis balls better?
Ratkovich, of Penn, said Penn ATP World Tour and Pro Penn Marathon balls had a higher grade of felt and a stronger rubber core for players with more power and spin. They cost more but last longer. … Wilson’s extra-duty tennis balls, introduced in 1960, are the ball of choice for most hardcourt play.
What is the difference between Penn 1/2 and 3 tennis balls?
The organization uses numbers to identify the different types. Type 1 is for play on slow court surfaces, such as clay. Type 2 is for medium-paced courts, such acrylic and carpet, and Type 3 is for faster courts, such as artificial turf and grass.
Which tennis ball bounces higher?
Pressurised balls