One of the areas outside the singles court that come into play in doubles. The alleys are 4 feet wide.
extension of the court by 1-1/2 feet on both sides for doubles play
The area of the court between the singles and doubles sidelines, also known as the tramlines
The area between the singles sideline and the doubles sideline.
The area on both sides of the court near the sidewalls that is formed by extending an imaginary line from the doubles service box to the front and rear walls.
The court area between the singles and doubles lines
area on each side of the singles court that enlarges the surface area for doubles play, also known as the tramlines.
there are 2, one on each side of the court. They are narrow strips between the two side boundary lines. Area used only for doubles play
Doubles alley, the portion of the court that extends width-wise from the singles court
The area along the sidewalls. See Rail.
The extra width on the left and right side of the court--between the baselines and net--that may be used during doubles.