Men's singles can be divided into four groups, and each group decides the top two to qualify; A 1 - B2,B 1 - C2,C 1 - D2,d 1-A2; The first group of winners-the second group of winners; The third group champion versus the fourth group champion; Then the winner decides the champion and runner-up, and the loser decides three or four.
If you want to be in a hurry, you can adopt a six-point system (six points for each game, and the rules are the same as eleven points), and win two out of three games.