After a fighter passes 10 fights hes considered "open" that means on his 11th fight he could fight a person that has 130 fights. Before 10 fights the fighter has to fight someone close to his age and close the same number of fights so that both fighters are equal. Any skill level can compete in any tournament thats why theres classes like "novice" or "all comers" both are for beginners. Once you get to the tournament you will find out whether or not theres anyone there that meets the criteria to fight you. If not you will be considered "unopposed" and get a medal for participating. If there are people there that meet the criteria then you will find out how many so that you know how many days your fighting, in which ring, and the number fight you are for that day.

If theres only one person there to fight you then you will only fight one fight. Bigger tournaments like a state golden gloves would be around four or five days with a lot of people that qualify to fight you so you may fight 3,4,or even 5 times in that 5 day tournament.