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Tennis is a sport usually played between two players (singles) or between two teams of two players each (doubles). Each player uses a racket that is strung to strike a hollow rubber ball covered with felt over a net into the opponent'scourt. The object of the game is to play the ball in such a way that the opponent is not able to play a goodreturn. Tennis is an Olympic sport and is played at all levels of society at all ages. The sport can be played by anyone who can hold a racket, including people in wheelchairs.

The modern game of tennis originated in Birmingham, England in the late 19th century as "lawn tennis" which has close connections to various field/lawn games as well as to the ancient game of real tennis. Up to then, "tennis"referred to the latter sport: for example, in Disraeli's novel Sybil (1845), Lord Eugene De Vere announces that he will "go down to Hampton Court and play tennis. As it is the Derby [classic horse race], nobody will be there". After its creation, lawn tennis spread throughout the upper-class English-speaking population before spreading around the world.

The rules of tennis have not changed much sincethe 1890s. Two exceptions are that from 1908 to 1961 the server had to keep one foot on the ground at all times, and the adoption of the tie-break in the 1970s. A recent addition to professional tennis has been the adoption of electronic review technology coupled with a point challenge system, which allows a player to challenge the line (or chair) umpire's call of a point. Players have unlimitedopportunities to challenge provided the challenges made are correct. However, once three incorrect challenges are made in a set, they cannot challenge again until the next set. If the set goes to a tie-break, players are given one additional opportunity to challenge the call. This electronic review, currently called Hawk-Eye, is available at a limited number of high-level ATP and WTA tournaments.HOW TO PLAY?

A tennis game starts with the pull of one of the players must hit the ball so it bounces inside the box diagonal to the side that takes, that is if a player gets from his right, the ball must bounce in the box on the left but always in the box attached to the network side of his rival and metersala very strong. For each point the player has two opportunitiesout if it fails the first, has one more. After the break, the player must pass the ball from one field to another in search of the ball bounce twice and can get a point. The games are 4 points and the sets of 6 games, while the match or match is divided into 2 sets (maximum 3) at the ATP World Tour tournaments and 3, maximum of 5 in Grand Slam tournaments 0.


- Only youcan give a blow to the ball
2. - This can only bounce once on your side of the court
3. - The service must be cross attaching the box without touching the net
4. - The scores are 15, 30, 40 and game, if there is a tie in 40 must win by 2 points for 1 game or "game", parties are to 2 of 3 sets each earned reaching 6 games
5. - 1v1 or 2v2 is played


hockey Hockey is a family of sports in which two teams play against each other by trying to maneuver a ball or a puck into the opponent's goal using a hockey stick. In many areas, one sport (typically field hockey or ice hockey is generally referred to simply as hockey.


This sport is played on natural grass or artificial (synthetic lawn with water or sand) without skates ofany kind, with a stick, which has a flat face and a curve with a solid plastic ball almost ap penalty cards: green yellow and red. The green is often used mainly as a warning and in accordance with the new rules of the FIH leads 2 minutes of removal. The forces the player is shown the yellow out of the playing field for a time determined by the arbitrator to punish, which can be 5 minutes (if...
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