My life is a role

The game is played with a hollow rubber ball. Outside, the ball is covered with fluffy felt to give certain aerodynamic properties. Balls used in major competitions must meet established criteria, which include size 65.41-68.58 mm, weight 56.0-59.4 g, level of deformation, as well as color. The colors yellow and white are approved by the US Tennis Association and the ITF. Fluorescent yellow, also known as optical yellow, was introduced in 1972 as the most visible color for television, although other bright colors may be seen in amateur sports. A closed line of a characteristic shape is applied to the surface of the ball. Balls with a pressure of about two atmospheres are most common, but there are balls without internal pressure, made of harder rubber to provide rebound.

In the process of competition in the market of racket manufacturers, a more or less stable “grouping” of two dozen manufacturers has formed. .), since the higher the skill of a tennis player, the more sensitive he is to the parameters of the racket. High-level professionals, as a rule, play rackets made by individual companies, taking into account their playing and anatomical features. Models are updated in about a year or two, but the most popular models can be produced for a longer period.

The International Tennis Federation (ITF) in the tennis rules regulated the requirements for rackets. The length of the racket (increasing), head size (increasing), the uniformity of the arrangement of strings, the presence of devices on the racket (including mechanical and electronic) are limited. The length of the racket must not exceed 29 inches (73.66 cm), while the nominal size for adults is 27 inches (68.58 cm), for boys and children the following rows are recommended: 26, 24, 21, 19 inches. The width of the racquet must not exceed 12.5 inches (31.75 cm), and the size of the string surface of the racquet (SBR), that is, the internal dimension (to the rim) - 11.5 inches (29.21 cm) in width and 15.5 inches (39.37 cm) long. Typically, racket manufacturers do not give the linear dimensions of racket heads, they certify the racket string surface area (SPR).

To strike the ball, the player uses a racket, which consists of a handle and a rounded rim with stretched strings. The string surface is used for hitting the ball. Racket rims were originally made of wood, but are now made of complex composites of ceramics, carbon fiber and metals.
Strings for tennis rackets are artificial (nylon, polyester, kevlar) and natural (made from bull sinew). Previously, natural strings were considered to have the best performance for playing, but modern artificial strings have caught up in performance with natural ones. In addition, natural strings are more expensive, susceptible to moisture, less durable, and require delicate care. The strings are stretched on special machines, sometimes by hand. The tension force of horizontal and vertical strings, as a rule, is different, and horizontal strings are pulled with a force of 2 kg less. The standard tension on the new rackets is 26 to 24 kg. The tighter the strings are, the easier it is to control the ball when hit, but the impact force is less. The weaker the stretch, the easier it is to disperse the ball, but the control is worse. Thin strings tend to be taut with less force and improve ball control, but are less durable. In many ways, the quality of a string depends on its structure.

There are different types of tennis court surfaces: grass, clay, hard, or synthetic carpet (artificial grass, acrylic surfaces). The type of surface affects the bounce of the ball and the dynamics of the movement of players, so the strategies for playing on courts with different surfaces can vary dramatically. At the same time, there is no one preferred surface, and even the most prestigious professional tournaments are held on different types of courts. The standard size of a tennis net is 1.07 m x 12.8 m, and has square cells with a side of 40 mm. Mounts can be classic screw or metal.

Tennis is played on a rectangular court with a flat surface and applied markings - a court. In the middle of the court, a net is stretched, which runs along the entire width, parallel to the back lines, and divides the court into two equal halves. The length of the court is 23.77 m, the width is 8.23 ​​m (for a single game) or 10.97 m for a double game. The lines along the short sides of the court are called the back lines, along the long sides the side lines. Outside the markup - additional space for players to move. Service zones are also marked on the court with service lines parallel to the back lines and the net, located 7 yards (6.40 m) from the net and drawn only between the side lines for singles, and a center service line drawn parallel to the middle of the court sidelines and between service lines. The center service line is also displayed on the net by a vertical white stripe stretched from the surface of the court to the top of the net. A short mark is applied to the back lines, indicating their middle. All lines drawn on the court are part of the court. A ball that hits or barely hits the line also counts. Thus, the outer edges of the lines are the boundary of the court.

More than four centuries passed before the strings appeared on the racket. The game began to gain even more popularity, followed by the clergy began to play the wealthy French. The game was captured by a huge number of people. And in 1480, King Louis XI of France issued a decree that strictly regulated the process of making tennis balls. The terms of the order were as follows: the ball must be filled with good leather and wool and must not contain sand, chalk, lime, sawdust, moss, ash or earth. Following men in the XV - XVI centuries, women became interested in playing ball. In 1427, in Paris, a young woman named Margot [3] played so brilliantly that only the best male players could match her speed of passing the ball.

It is officially believed [2] that tennis appeared in the XIV century in modern France. The French nobility was fascinated by the so-called "palm game" ("same where pom"), which had a great influence on the development of modern tennis. The first amateur players were the clergy, and not only young seminarians, but also priests of higher ranks: archbishops and cardinals. The game was held in the walls of monasteries, mostly on the stone floor. Later, for the convenience of playing on the hand hitting the ball, they began to wear a glove and bounce the ball with wooden objects, which were later transformed into so-called rackets. These wooden objects bore little resemblance to a modern racket.

If we do not take into account the games of the ancient Greeks and Romans, in which the ball was hit by hand or with a wooden stick, the first mention of a game similar to tennis can be found in the XII-XIII centuries in Italy. The game was called "jidoko", and the ball was reflected in a gloved hand, a wooden shield or a leather belt.

During the game, players use additional game equipment - a racket. It is designed to reflect, change the direction and power of the rubber tennis ball. The match is won by the one who gets the most wins in sets according to the rules of the game, which apply according to gender, age of the tennis player and so on.

Tennis or tennis is a sport in which two players play against each other, or two teams of two players each, team against team, on a court-divided court. in half with a cross grid.
The object of the game is to throw the racket through the net to the opponent's side so that the ball falls within the opponent's court and he cannot bounce it back.