Where Is The Service Line In Tennis?

Tennis Service Line

There are several lines on a tennis court that help regulate gameplay and scoring. A few of these lines are service lines, which denote the boundaries of the service boxes. Have you ever wondered exactly where the service lines are located? Keep reading to find out.

Where Is the Service Line in Tennis?

In tennis, the service line helps define the area in which a serve must land before it can be returned. It is the outermost boundary where a serve must land before it is returned. On a regulation tennis court, the service line is drawn parallel to the net at a distance of 21 ft from the net. The service line is 27 ft wide, ending at the singles sideline.

The service line is the outermost boundary of the service box. If a serve lands beyond the service line, it is a fault. However, a serve may land on the service line itself and still be considered a good serve.

Tennis Center Service Line

tennis center service line

The center service line divides the service area of the court into two equal boxes called the service boxes. The center service line establishes the rest of the service box with the help of the singles' sidelines.

The center service line runs perpendicular to the net, dividing the area between the net and service line into two equal boxes that are 21 ft by 13.5 ft. These two boxes on either side of the court are called the left and right service boxes. 

Tennis Service Box

The tennis service box is a rectangular area to which the player serving must aim their serve. For a serve to be considered a “good serve,” the ball must bounce in the service box before being returned by the other player. If a serve lands outside the designated box, it is an invalid serve, or a “fault,” and must be re-served.

When serving, a player stands behind the baseline of the court and must send the ball into the service box diagonally across from where they are serving. Although the total court size in singles games is smaller than in doubles games, the service box is the same for both.


What is the service line?

The service line is a boundary down the center of the service area of a tennis court. According to ITF regulations, the line is 21 ft long and runs directly down the middle of each side of the court, dividing the service area into two equal boxes that are 21 ft by 13.5 ft.

How does the service line work?

The center service line divides the service area of the court into two service boxes. This separation marks the boundary within which a player must stand while serving to the opposing player or team.