Rules

11. Second Service
After a fault (if it is the first fault) the Server shall serve again from behind the same half of the Court from which he served that fault, unless the service was from the wrong half, when, in accordance with Rule 9, the Server shall be entitled to one service only from behind the other half.

Case 1. A player serves from a wrong Court. He loses the point and then claims it was a fault because of his wrong station.
Decision: The point stands as played and the next service should be from the correct station according to the score.

Case 2. The point score being 15 all, the Server, by mistake, serves from the left-hand Court. He wins the point. He then serves again from the right-hand Court, delivering a fault. This mistake in station is then discovered. Is he entitled to the previous point? From which Court should he next serve?
Decision: The previous point stands. The next service should be from the left-hand Court, the score being 30/15, and the Server having served one fault.