Deuce

When playing a game to 11 points, deuce is reached when both players gain at least 10 points each, and the scores are tied (for example, 10-all, 11-all, 12-all). When deuce is reached, service alternates after each point, until one player gains a two-point advantage.

If the game is played to 21, deuce is reached when the score is tied 20 all, or above.