At the beginning of the game (0-0) and when the server's score is even, the server serves from the right service
court.
When the server's score is odd, the serve serves from the left service court. If the
server scores a point and serves again from the alternate service court.
If the receiver wins a rally, the receiver scores a point and becomes the
new server. They serve from the appropriate service court - left it their score is odd, and right if it
is even.
