How to draw lots for the four teams to participate in the tug-of-war competition?

Suppose that the four teams participating in the competition are Team A, Team B, Team C and Team D, and the competition arrangements are as follows:

First of all, the schedule:

A total of * * * three rounds and six games:

1 Round 1: Team A vs Team B; Round 65438 +0 Game 2: Team C vs Team; The second round 1 match: Team A vs Team; Round 2, Game 2: Team B vs Team B; The third round 1 match: Team A vs Team; Round 3, Game 2: Team B vs Team;

Second, the competition ranking:

1, ranked according to the victory of three games; 2. If the two teams have the same record (2 wins 1 negative), it depends on the results of the competition between the two sides, and the winner ranks first; 3. If three teams have the same record (2 wins 1 negative), then compare the scores of each team in three games to rank. Single round robin is that all participating teams can meet once, and finally rank according to the points and gains and losses of each team in all competitions.

Extended data:

Round robin includes single round robin, double round robin or group round robin. Single cycle means that all teams (people) take turns to compete with each other once; Double cycle means that all teams (people) take turns to compete with each other twice; Group round robin refers to that when there are many teams (people), the stronger teams (people) are dispersed in each group in the form of seeds, and the group single round robin is held first, and then the second stage competition is organized according to the group ranking. Organizers can choose flexibly according to the number of teams, the duration of the competition and the characteristics of the project. Under normal circumstances, in the case of few teams and sufficient competition time and venue, single cycle should be adopted; The grouping period is mostly used in the case that there are many teams and the competition time cannot be too long, so as to provide the teams with the opportunity to arrange their rankings reasonably.