7. The server shall throughout the delivery of the service: (a) not change his position by walking or running; (b) maintain contact with the ground; (c) keep both feet behind (i.e., farther from the net than) the base-line.
8. In delivering the service, the server shall stand alternately behind the right and left courts, beginning from the right in every game. The ball served shall pass over the net and hit the ground within the service-court which is diagonally opposite, or upon any line bounding such court, before the receiver returns it.
9. The service is a fault : (a) if the server commit any breach of rules 6, 7, or 8; (b) if he miss the ball in attempting to strike it ; (c) if the ball served touch a permanent fixture (other than the net, strap or band) before it hits the ground.
Io. After a fault (if it be the first fault) the server shall serve again from behind the same half of the court from which he served that fault, unless it was a fault because he served from behind the wrong half, when he shall be entitled to deliver one service from behind the other half. A fault may not be claimed after the next service has been delivered.
I I. The server shall not serve until the receiver is ready. If the latter attempt to return the service, he shall be deemed ready. If, however, the receiver signify that he is not ready, he may not claim a fault because the ball does not hit the ground within the limits fixed for the service.
12. The service is a let : (a) if the ball served touch the net, strap or band, provided the same be otherwise good; (b) if a serv ice or fault be delivered when the receiver is not ready (see rule I I). In case of a let, the service counts for nothing, and the server shall serve again, but a let does not annul a previous fault.
13. At the end of the first game the receiver shall become server, and the server receiver; and so on alternately in all the subsequent games of a match. If a player serve out of turn, the player who ought to have served shall serve as soon as the mistake is discovered, but all points scored before such discovery shall be reckoned. If a game shall have been completed before such discovery, the order of the service remains as altered. A fault served before such discovery shall not be reckoned.
14. A ball is in play from the moment at which it is delivered in service (unless a fault or a let) and remains in play till the point is decided.
15. The server wins the point: (a) if the ball served touch the receiver or anything which he wears or carries before it hits the ground; (b) if the receiver otherwise lose the point as provided by rule 17.
16. The receiver wins the point : (a) if the server serve two con secutive faults; (b) if the server otherwise lose the point as pro vided by rule 17.
17. A player loses the point if : (a) he fail, before the ball in play has hit the ground twice consecutively, to return it directly over the net (except as provided in rule 20 [c]); or (b) he return the ball in play so that it hits the ground, a permanent fixture, or other object, outside any of the lines which bound his opponent's court ; or (c) he volley the'ball and fail to make a good return even when standing outside the court; or (d) he touch or strike the ball in play with his racket more than once in making a "stroke"; or (e) he or his racket (in his hand or otherwise) or anything which he wears or carries, touch the net, posts, cord or metal cable, strap or band, or the ground within his opponent's court at any time while the ball is in play; or (f) he volley the ball before it has passed the net : or (g) the ball in play touch him or anything that he wears or carries, except his racket in his hand or hands; or (h) he throws his racket at and hits the ball.
18. A ball falling on a line is regarded as falling in the court bounded by that line.
19. If the ball in play touch a permanent fixture (other than the net, posts, cord or metal cable, strap or band) after it has hit the ground, the player who struck it wins the point; if before it hits the ground his opponent wins the point.