How do you earn points in playing table tennis?
You play to 11. Only during the serve may you hit your side of
the table, it must bounce twice, once on your side, once of their
side. Afterwards, you must send the ball back to their table after
it hits yours by the other player.
As long as the ball hits the other players table its in.
If your playing doubles you alternate hits and serve forehand
diagonal, same points to 11.
The referee will do the calling in a tournament