Tennis balls were originally made of cloth strips stitched together with thread and stuffed with feathers. Modern tennis balls are made of hollow vulcanized rubber with a felt coating. Traditionally white, the predominant colour was gradually changed to optic yellow in the latter part of the 20th century to allow for improved visibility. Tennis balls must conform to certain criteria for size, weight, deformation, and bounce to be approved for regulation play. The International Tennis Federation (ITF) defines the official diameter as 65.41–68.58 mm (2.575–2.700 in). Balls must weigh between 56.0 and 59.4 g (1.98 and 2.10 oz). Tennis balls were traditionally manufactured in the United States and Europe. Although the process of producing the balls has remained virtually unchanged for the past 100 years, the majority of manufacturing now takes place in the Far East. The relocation is due to cheaper labour costs and materials in the region. Tournaments that are played under the ITF Rules of Tennis must use balls that are approved by the International Tennis Federation (ITF) and be named on the official ITF list of approved tennis balls.
One thing all test players could quickly agree on: The Burn FST 99 can be swung very fast. With all shots the club could be swung and maneuvered extremely fast. This way, we always got the club into the optimum stroke position, even with fast rallies. The comfort is also surprisingly high, considering that the racquet with a frame hardness of 72RA is actually rather hard. The relatively thin frame of the racquet made it possible for the racquet to give way in exactly the right places and thus to cushion the impact well when hitting the ball.
In a legal service, the ball travels over the net (without touching it) and into the diagonally opposite service box. If the ball hits the net but lands in the service box, this is a let or net service, which is void, and the server retakes that serve. The player can serve any number of let services in a point and they are always treated as voids and not as faults. A fault is a serve that falls long or wide of the service box, or does not clear the net. There is also a "foot fault", which occurs when a player's foot touches the baseline or an extension of the center mark before the ball is hit. If the second service is also a fault, the server double faults, and the receiver wins the point. However, if the serve is in, it is considered a legal service.
To determine who serves first, you flip a coin or (more likely) spin a racket. Whoever wins the toss gets to decide one of four things: that she wants to serve first, that she wants to receive first, which side of the court she wants to start on (in which case, the opponent chooses who serves first), or that she wants to leave the choices up to her opponent.
On 21 May 1881, the oldest nationwide tennis organization in the world was formed, the United States National Lawn Tennis Association (now the United States Tennis Association) in order to standardize the rules and organize competitions. The U.S. National Men's Singles Championship, now the US Open, was first held in 1881 at the Newport Casino, Newport, Rhode Island. The U.S. National Women's Singles Championships were first held in 1887 in Philadelphia.
Vibration dampeners (also sometimes known as "gummies") may be interlaced in the proximal part of the string array, to reduce the percussive sound of the ball hitting the strings and/or to reduce perceived vibration. They do not, however, reduce impact shock significantly, so they are of no safety value. Some professionals, such as Andrei Agassi, used rubber bands instead of specialized dampeners. Dampeners come in two main types. The first uses the two central main strings to hold it in place. The second is sometimes called a "worm" and it is woven between many of the main strings. Dampeners are nearly always placed very near the bottom of the racket string bed.
This tennis racquet from Head is both affordable and very functional. It is an excellent quality entry level tennis racquet that most beginners will really find to their liking. It has a good grip that fits smaller size hands well and it is constructed out of materials that keep it stiff as you hit the ball to help generate extra power on your shots.