| If you think that tennis balls are simply yellow fuzzy | | | | indoor and clay courts. Extra duty balls would get too |
| balls, one no different from another, you are most | | | | fuzzy if used on clay courts. |
| definitely wrong. Tennis balls are much more than that. | | | | · Extra duty tennis balls are used on grass courts |
| Here are some facts about tennis balls that you may | | | | and tennis courts. |
| or may not already know: | | | | · High altitude tennis balls are used in places like |
| Pressurized vs. Pressureless Tennis Balls: | | | | Denver where you are playing 4,000 feet or more |
| · There are two main types of tennis balls: | | | | above sea level. These balls have different pressure - |
| pressurized and pressureless. | | | | regular balls would bounce too much at this elevation. |
| · Pressurized tennis balls have a hollow core, filled | | | | Tennis Ball "Fuzziness:" |
| with air. Some tennis ball manufacturers use nitrogen in | | | | · Without the yellow (or white...) fuzziness of tennis |
| the center, because this air tends to last longer - | | | | balls, the game of tennis would be a whole lot different. |
| pressurized balls will lose their pressure after about a | | | | The fuzz of the tennis balls creates friction. The |
| month or so after opening the pressurized can that | | | | fuzziness of the balls creates dray in the air, making |
| they come in. As they lose their pressure, they | | | | topspin and backspin more pronounced and more |
| become "dead" and do not bounce so well. | | | | possible. |
| · Pressureless balls have a solid core. These | | | | Numbers on the Tennis Balls: |
| tennis balls are great for anyone who does not play | | | | · Have you ever wondered what the numbers on |
| tennis that often and/or to use and training tennis balls. | | | | your tennis balls meant? Do they reference the weight |
| These tennis balls do not lose their bounce. However, | | | | or style of the tennis balls, etc.? No. |
| the felt will slowly wear off, and they will eventually | | | | · The numbers on the tennis balls are simply for |
| need to be replaced. | | | | your benefit - if you are playing with Wilson 1 balls, and |
| Regular Duty, Extra Duty, or High Altitude Tennis Balls: | | | | the people on the court next to you are playing with |
| · When you buy tennis balls, the container that | | | | Wilson 2 balls, it is easier to retrieve your tennis balls |
| they come in should be clearly marked with what kind | | | | when they wander onto another tennis court. The |
| of balls it contains - regular duty, extra duty, or high | | | | numbers help you tell your balls apart from other |
| altitude tennis balls. | | | | players' balls (assuming that you are not using the |
| · Regular duty tennis balls should be used on | | | | same brand and same number of tennis balls! |