This article is from the Table Tennis (Ping Pong) FAQ, by ttennis@bu.edu with numerous contributions by others.
The format of a tournament or tournament events can be single elimination,
double elimination, round-robin, or a combination of these formats.
Single Elimination - This format is the simplest to set up and run. It has
the fewest number of matches for a given number of entries. it is the most
common format for championship and class singles events when there is a
large number of players. Preliminary matches should be two out of three.
Semi-finals and finals should be three out of five.
Double Elimination - This is a good format when there is insufficient
information for seeding players and you don't have too many entries.
Matches should be two out of three, including the finals.
Round-Robin - This format provides maximum play and is practical when there
are few entries or when it is used as one stage of an event such as the
semi-finals of a single- or double-elimination event. Round-robins are
popular among players and should be used as often as possible for junior,
women's, and novice events. All matches in a round-robin should be two out
of three.
Combinations - A round-robin followed by single elimination for semi-finals
and finals is appropriate for most events when round-robin play is desired
but there are too many entries for a full round-robin. You could also have
a single elimination down to the last four players and then a round-robin.
 
Continue to: