Real Tennis

Players use a stringed racquet to strike a hollow rubber ball covered with felt over a net into the opponent's court. Originating in Europe in the late 19th century, tennis spread first throughout the English-speaking world, particularly among the upper classes. Tennis is now once again an Olympic sport and is played at all levels of society, by all ages, and in many countries around the world. Except for the adoption of the tie-breaker in the 1970s, its rules have remained remarkably unchanged since the 1890's. Along with its millions of players, millions of people follow tennis as a spectator sport, especially the four Grand Slam tournaments.

Tennis is played on a rectangular, flat surface, usually grass, clay, or a hardcourt of concrete and/or asphalt. The court is 78 feet (23.77 m) long, and its width is 27 feet (8.23 m) for singles matches and 36 feet (10.97 m) for doubles matches.[32] Additional clear space around the court is required in order for players to reach overrun balls. A net is stretched across the full width of the court, parallel with the baselines, dividing it into two equal ends. The net is 3 feet 6 inches (1.07 m) high at the posts and 3 feet (914 mm) high in the center.[32]

Each of the lines that delineate the width of the court is called the baseline. The short mark in the center of each baseline is referred to as either the hash mark or the center mark. The outermost lines that make up the length are both called the doubles sideline. These are the boundaries used when doubles is being played. The area between the doubles sideline and the lines next to them is called the doubles alley, which is considered out in singles play. These lines next to the doubles sideline are the singles sidelines, and used as boundaries in singles play. The line that runs across the center of a player's side of the court is called the service line; despite its name this is not where a player legally stands when making a serve. The line dividing the service line in two is called the center line or center service line. The boxes this center line creates are called the service boxes; depending on a player's position, they will have to hit the ball into one of these when serving. A ball is out only if none of it has hit the line upon its first bounce.

The players (or teams) start on opposite sides of the net. One player is designated the server, and the opposing player, or in doubles one of the opposing players, is the receiver. Service alternates between the two halves of the court.

For each point, the server starts behind her or his baseline, between the center mark and the sideline. The receiver may start anywhere on their side of the net. When the receiver is ready, the server will serve, although the receiver must play to the pace of the server.

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 service, which is void, and the server gets to retake 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. Let services are extremely unusual, and placing more than one let services in a single point takes a considerable amount of skill or luck. If the first service is otherwise faulty in any way, wide, long or not over the net, the serving player has a second attempt at service. There is also a "foot fault" which occurs when a player's foot touches the baseline or an extension of the center mark[33] before the ball is hit. If the second service is also faulty, this is a double fault and the receiver wins the point. However, if the serve is in then it is considered a legal service.

A legal service starts a rally, in which the players alternate hitting the ball across the net. A legal return consists of the player or team hitting the ball exactly once before it has bounced twice or hit any fixtures except the net provided that it still falls in the server's court. It then travels back over the net and bounces in the court on the opposite side. The first player or team to fail to make a legal return loses the point.