If is your first tournament could be better you look for a referer to your match. Better if is a admin or mod from the forum: Leitner, JuanMata, JOHNRAMBO, Tom Baker.
Except final, all matches are to best of 3 sets. Winner of set is first to achieve 6 points with +2 in difference to the opponent. If you are 5-5 you need 7 points, if you are 6-6 you need 8... To write the result we will put 7-6 to the winner like it was a tie break ;P