xv. The first stroke won by either player scores 15 to that player;

the second, won by the same player, raises his score to 30, his third stroke to 40, and his fourth counts _game_. If, however, the players have both scored 40, it is called _deuce_, and the next stroke won by either is called _advantage_ to the winner of it, and if he also win the following stroke he scorea _game_. Should he lose it the score returns to _deuce_. The player winning two consecutive strokes directly following a _deuce_ scores game.