What is duce in badminton?

"Deuce", is used when both players have tied at three points in a game. 40-40. A deuce is when the player tie after that. You will need to understand ads to help you understand deuces.

For instance:

(here some basic scores for a deuce game)

15-0

30-0

30-15

40-15

40-30

40-40 DEUCE