Dual Play Format consists of 2 schools facing off with five doubles teams each. Teams are paired up head-to-head (1v1, 2v2, 3v3 etc). Sets 1 and 2 are played to 21 points, and if a tie then the deciding third set is to 15.
Some competitions are flighted. It is basically Dual Play Format with a point system, where respective doubles teams from each school face off. There are 5 flights in order of skill level. A 1st place finish in each flight earns 4 points, 2nd place earns 3 pts, 3rd place earns 2 pts, and 4th place earns 1 point. Points are totaled for each program, so if a school placed first in all 5 flights, they would get 20 cumulative points. If a team got last in every flight, they would finish with just 5 cumulative points.