In a tennis match, if a player retires, the remaining sets and matches are counted as the opponent's victory, and the score obtained by the opponent due to the player's withdrawal is added to the final score.

Rules of Tennis Competition: Tennis competition is divided into singles and doubles. The player hit the ball over the net with a tennis racket and the ball fell into the opponent's court. The goal of each player is to try his best to hit the ball on the other side's court until one side hits the ball out of bounds or misses. Before the official game, it is necessary to determine who will serve first. Throughout the game, players from both sides took turns serving. Before serving, the server should stand in the area between the end line, the midpoint and the assumed extension line of the sideline. The serve should go over the net and land on the opposite service court. The first score of each game is 15, the second score is 30, and then 40. Every game must be at least 2 points more than the opponent to end the game. In the new doubles rules, the team only needs one more point to win.