The eighth team is divided into two groups, namely Group A and Group B.. All right, let's draw lots to decide. There are four teams in each group.
Group a: 1, 2, 3, 4
Group b: groups a, b, c and d.
Group a 1 day: first, 1 and 2, 3 and 4,
The next day, group B: A and B, C and D.
Day 3 Group A: 1 and 3, 2 and 4.
Day 4 Group B: A and C, B and D.
Day 5 Group A: 1 and 4, 2 and 3.
Day 6 Group B: A and D, C and B.
The group match will be OK, and then I will help you design the elimination match.
You can rest here for a day or two, but if time is tight, you can rest.
Semi-final1:the first pair in group a and the second pair in group B.
Semi-final 2: The first pair in Group B and the second in Group A..
Three or four finalists: the third place in the semi-final was defeated
Final: semi-finalists compete for the championship.
So one week is enough. In order to let the team eliminated by the group play several games, a ranking match can also be designed. It's the same as the semi-final type, except that the team is changed to the third and fourth place in the group. The principle is the same, that is, to win the fifth place. Can be interspersed in the knockout schedule, as long as the final is played on the last day. Hehe, my plan is for reference only. It depends on your own arrangement.