Generally speaking, a team participating in a team competition consists of three players and a captain. Before the competition, the captains of both sides draw lots to decide the choice of A, B, C and X, Y and Z, and submit the list of players assigned to the first letter to the referee.
The order of the games is: the first game A-X; The second game b-y; C-z in the third game; Game 4 a-y; Game five, b-X.
Every game is the best of three games. When a team wins three games, the game is over.
Generally speaking, A, B, C and X, Y and Z are what we call the first order, the second order and the third order.