Issue link: http://itf.uberflip.com/i/623773
16. THE SERVICE Immediately before starting the service motion, the server shall stand at rest with both feet behind (i.e. further from the net than) the baseline and within the imaginary extensions of the centre mark and the sideline. The server shall then release the ball by hand in any direction and hit the ball with the racket before the ball hits the ground. The service motion is completed at the moment that the player's racket hits or misses the ball. A player who is able to use only one arm may use the racket for the release of the ball. 17. SERVING When serving in a standard game, the server shall stand behind alternate halves of the court, starting from the right half of the court in every game. In a tie-break game, the service shall be served from behind alternate halves of the court, with the first served from the right half of the court. The service shall pass over the net and hit the service court diagonally opposite, before the receiver returns it. 18. FOOT FAULT During the service motion, the server shall not: a. Change position by walking or running, although slight movements of the feet are permitted; or b. Touch the baseline or the court with either foot; or c. Touch the area outside the imaginary extension of the sideline with either foot; or d. Touch the imaginary extension of the centre mark with either foot. If the server breaks this rule it is a "Foot Fault". Case 1: In a singles match, is the server allowed to serve standing behind the part of the baseline between the singles sideline and the doubles sideline? Decision: No. Case 2: Is the server allowed to have one or both feet off the ground? Decision: Yes. 19. SERVICE FAULT The service is a fault if: a. The server breaks Rules 16, 17 or 18; or b. The server misses the ball when trying to hit it; or c. The ball served touches a permanent fixture, singles stick or net post before it hits the ground; or d. The ball served touches the server or server's partner, or anything the server or server's partner is wearing or carrying. 8