In a tennis match, how often are the balls changed? The balls in a significant match should be changed every 7-8 games. Except for the first ball change, which occurs early since the same balls are used during the warm-up. Balls in warm-ups are usually not as soft as those in actual matches.
During a game, the player who serves receives a new ball from the server. If the receiver returns it, then the ball is dead and another is supplied by the opponent. A rule was introduced in 1999 to prevent the server from getting an advantage by always receiving a new ball. Previously, if the receiver returned the first serve unservable, the server would immediately receive a new one. Now both players must wait until the end of the point before they get a new ball.
The baseline player is allowed two balls per game. When he goes to the net, he gets one more. So in total, each player gets five balls per game. They can come from either side of the court. However, once a player has had four balls thrown to him, that's it; no more will be served until the end of the game or set. This means that if one player has a large lead, he can throw out most of his balls by going back on defense to avoid giving away free points.
The International Tennis Federation must authorize the tennis balls (ITF). Tennis balls are replaced after seven games in Grand Slams, ATP and WTA competitions, and every nine games after that. Balls used in exhibition matches may never be replaced.
The ITF tests all balls before they are authorized for play. If a ball is found to be defective, then it is removed from the list of available replacements and will be sent back to the manufacturer for a new one.
There are three types of balls used in tennis: singles, doubles, and mixed doubles. Singles balls are white or light blue in color, while doubles and mixed doubles balls are dark blue or black. All balls have strings of equal tension. Replacement balls are of the same type as the original ball by law so as not to give an advantage to any player or team.
Balls come in different sizes ranging from small to large. The size determines how many shots can be hit with it, while the hardness varies depending on the type of shot required. For example, a slow ball is used by the server to pass to the sidelines, while a fast ball is hit by both the server and the receiver to reach distant places on the court.
If the umpires disagree with the captain, the ball will not be replaced. In a cricket match, the balls are replaced based on their condition. The balls lose their swing, seam movement, and speed as they age. As a result, it altered after a different amount of overs in a different match profile. Internationally, it changed roughly 40 times in a single day. In domestic matches, the rule is often applied less frequently.
In Australia, the ball is replaced if it is "dead" (does not move the wicket when hit). This means that, regardless of how many more balls there are in the over, the captain will replace the ball at this point.
In England, the ball is replaced if it is "dead" or has significant wear and tear.
The ball can also be replaced during breaks in play. For example, if the fielders take a break while the batsman moves into position, then a new ball will need to be used when they return to the crease.
Finally, if the ball becomes damaged in some way (such as being slashed), then it should be replaced. This includes balls cut open by batsmen trying to gain an advantage by testing the hardness of the wax coating.
After each match, each racquet is restrung. In addition, new balls are used after the first 7 games of each match, and then every 9 games for the balance of the competition. Changing to an older model racquet is called "maturing" the racquet.
The modern tennis racquet has changed very little in design since it was invented in 1877 by William Harrison Ayrton. It was not until the mid-1930s that any significant changes were made to the racquet's construction. The most recent modification was done in 1995 by ProStaff Sports USA, who introduced the "Integrity" frame. This new model removed the bracing underneath the racquet head which had been used in previous years' frames.
The original Ayrtons were made from wood. In 1878, a French manufacturer named Louis Dumont began manufacturing wooden frames with steel strings. These were the beginnings of today's modern tennis racquet. In 1930, the wooden frame was replaced with one made from metal for better weight distribution. In 1995, another change was made when ProStaff Sports USA introduced an all-polymer frame. Today, these are the only two types of frames available in professional tennis.