What is the elimination system in tennis? What is the arrangement of the single elimination of seven contestants?

This is very simple. If seven people take part in the competition, you will rank eighth. One of the seven people will go straight to the next round by bye. This can be decided by lot. The remaining six people play, and six people have three games. Three people will be eliminated and only four people will play in the second round. Four people play two games, the winner must be one or two, and the loser competes for the third place. Simply put, the elimination system means that you can't play if you lose, so you can be eliminated and you can play again if you win. Generally, this method can be used when there are more people attending.