Issue link: http://itf.uberflip.com/i/428396
34 APPENDIX IX SUGGESTIONS ON HOW TO MARK OUT A COURT Note: All court measurements shall be made to the outside of the lines. The following procedure is for the usual combined doubles and singles court. (See note at foot for a court for one purpose only.) First select the position of the net; a straight line 42 feet (12.80 m) long. Mark the centre (X on the diagram above) and, measuring from there in each direction, mark: at 13'6" (4.11 m) the points a, b, where the net crosses the inner sidelines, at 16'6" (5.03 m) the positions of the singles sticks (n, n), at 18'0" (5.48 m) the points A, B, where the net crosses the outer sidelines, at 21'0" (6.40 m) the positions of the net posts (N, N), being the ends of the original 42'0" (12.80 m) line. Insert pegs at A and B and attach to them the respective ends of two measuring tapes. On one, which will measure the diagonal of the half-court, take a length 53'1"