Why Are Tennis Balls Fuzzy? 5 Reasons Causing This Fuzz

Why are tennis balls fuzzy? Let’s answer this question. To completely answer this question let’s take a look at the manufacturing process of a tennis ball. A tennis ball consists of three materials. The Core, NAP, and the pressurized air filled inside the tennis ball.

Firstly, the core of a tennis ball is made from synthetic rubber known as butadiene, which is made from petroleum. The rubber is molded into a hemisphere and then cut into two semi-circles. Then these two semi-circles of rubber are glued together using heavy-duty glue.

After a rubber ball is created, it is covered with felt. The felt is cut into circles and sewn onto the ball using a special machine. After the manufacturing process is completed. The ball is set to cure for some time before being inspected and packaged for sale.

fuzzy tennis ball
In this picture: Three tennis balls are lying on the ground

Why Is There Fuzz On A Tennis Ball?

The fuzz on a tennis ball is also known as the Nap or Fluff. It is made up of soft, fine, and thick layers of fibers that cover the surface of the ball. Continuously hitting the ball with racquet results in a fluffy tennis ball. When a ball is hit by a racquet at a speed of 110 Mph back and forth the outer layer of the tennis ball, known as felt starts wearing off which results in the Fluff.

The fuzz on a tennis ball provides multiple benefits while playing. Let’s take a look at the effects of fuzz on a tennis ball.

Effects Of Fuzz On A Tennis Ball

The Fuzz on a tennis ball might look weird but it provides multiple benefits on the court.

  1. The fuzz is a thick layer of fibers that covers the ball therefore it makes the tennis ball texture softer and also increases the surface area of the ball which greatly helps in aerodynamics.
  2. Due to the fluff on the ball, there is more cushioning which restricts the ball from bouncing high up in the air, therefore, making it easier for the tennis player to control the ball.
  3. The fluff or felt nylon on a ball increases the surface area/tennis ball size therefore air goes through the fuzz or felt nylon on the tennis ball and slows down the ball, stopping it from going crazy fast.
  4. When a fuzzy tennis ball comes in contact with the racquet, it lightly grips the racquet allowing tennis players to have more control over the ball.

5 Reasons Causing Fuzz On A Tennis Ball

Reasons Causing Fuzz On A Tennis Ball
In this picture: there is a tennis ball covered in dirt

Fuzz on a tennis ball can be due to multiple reasons. One of the reasons that I have mentioned above is constantly hitting the tennis ball with a racquet back and forth.

This is the most common reason but there are multiple other reasons as well which we usually ignore.


  1. Poor storage conditions: Sometimes we get tired after a tennis match and forget to properly store the balls. This laziness results in the fluff on a tennis ball. Usually, when a ball is stored in a humid or damp condition, it becomes fuzzy due to the absorption of moisture. Similarly when a ball is stored in a hot environment for a long period. The heat can cause the fibers to break down which results in fluff on the ball.
  2. Age and wear:  Using the same tennis ball often can also cause fluff on it. With time the outer cover of the ball starts to break down which causes the fibers to become frayed and causes a fluffy ball appearance.
  3. Manufacturing defects: The fuzziness can also be caused due to defects in a tennis ball at the time of manufacturing such as uneven or rough surface on the outer cover.
  4. Impact: Repeated impacts with a tennis racquet can cause the fibers of the nylon fleet to break down which results in fluff.
  5. Quality of the ball: Tennis balls come in a wide variety. When you visit a sports equipment store you will see multiple types of tennis balls. To a normal person, all those balls would seem the same. Only a professional tennis player or the manufacturer of the ball can tell the difference between a high-quality and a low-quality ball. So what happens is that the low-quality balls are not designed to bear high impact therefore the tennis ball is more prone to becoming fuzzy over time.

How To Prevent Tennis Balls From Fuzz?

Prevent Tennis Balls From Fuzz
In this picture: There is a tennis ball lying on the ground

Tennis Ball Fuzz is a common problem that every tennis player face. You already have an idea about the reason behind the fluff on a ball. Now let’s discuss the solutions to prevent this problem.

Measures You Can Take:

The first measure that you can take to prevent tennis balls from fluff is to properly store the tennis balls. The ideal place to store your tennis ball is a cool and dry place. You are probably thinking that storing your tennis balls in an air-tight can will be enough but make sure you do not store the can under direct sunlight such as on a tennis court.

When a tennis can is exposed to heat it can cause humidity inside the can. This will cause fibers to break down and as a result fluff on the ball is formed.

Secondly, make sure you buy high-quality tennis balls. In short term, it might seem like cheap tennis balls are a good value for money but when you start playing with cheap balls every day it will cost you one tennis ball per game and a can of tennis balls per day. That’s not very cost-effective.

So only buy high-quality tennis balls because they are designed to take high impact and are less prone to fuzz than low-quality cheap tennis balls.

Another measure that you can take to prevent balls from fuzz is properly cleaning the tennis balls. While playing tennis on a grass court the ball tends to cover in mud or dirt. Which can be harmful to the tennis ball. So make sure to clean your tennis balls using a soft dry cloth after every game.

Lastly, while playing a tennis match regularly rotate the balls. If you keep serving the ball from the same side it will cause more impact which will result in more amount of wear and tear.

Final Thoughts On Fuzzy Tennis Balls

Tennis balls can get fuzzy often and it’s not a big deal. The fluff comes with multiple benefits which allow a tennis player to have more control over the ball. It increases the surface area of the ball, therefore, strengthening the Magnus effect, there is the science of tennis involved in this theory.

But if the fluff keeps increasing to a point when the ball is not responding the way a tennis player wants it to then the tennis ball needs to be replaced.


Why do they make tennis balls fuzzy?

Hitting a tennis ball without fuzz makes it go faster and that could even hurt somebody. Originally tennis balls were stitched with flannel to prevent them from going too fast. But nowadays it is replaced with felt nylon.

Why do tennis balls have lines?

The lines on a tennis ball are a result of the ball’s construction.  The two rounded shapes are joined to form the cover of the ball. And the lines are the seams that join them.

Were tennis balls made out of human hair?

Historically, tennis balls were made from moss, leather, human hair, and even sheep guts.

Why can’t tennis balls get wet?

Moisture causes the fibers to break down which results in fuzz on the tennis ball. That’s why it is advised to dry the tennis balls before using them again.

Why are tennis balls no longer white?

Tennis balls used to be black or white depending on the color of the court. But recently ITF introduced yellow balls into the rules of tennis because research showed yellow balls are more visible on the television screen.

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