In a table tennis game, a deuce means that both players have reached a point of tie. It happens when the score reaches 10-10. At this point, the game becomes a deuce, and players continue playing until one player gets a lead of 2 points.
So, a deuce is not a loss, a win, or a foul. It simply indicates a tie in the game where players need to score 2 consecutive points to win the game.