Table tennis match is arranged for 20 people and 4 tables. How to arrange the game scientifically after playing for two days?

Divide into 4 groups with 5 people in each group. Each group will compete in a single round, and the top two in the group will qualify. Then play a single knockout or top 8.

The group match will be held on 1 day, with 2 matches in the morning and 2 matches in the afternoon, with 4 matches per person. Each group has a desk.

If you only play the champion, use 1 table, play 1/4 finals in the morning, and play semi-finals and finals in the afternoon.

If you rank second, play the final of 1/4 with two tables in the morning, and then decide the ranking of 5-8; In the afternoon, two tables will be used in the semi-final, and then the third and fourth place will use 1 table for the final.