Round robin rounds are coming along good, they can either be 1 or 2 match tournaments ( 2 matches is basically home & away, play each team twice, 1 match you play each team once ), you will award points for either a win / lose / draw and then it will add to a table for that tournament
you can choose 4/6/8/10/12 team tournaments in the round robin ( at the minute ), but it will probably get limited at 20 teams as that will require 380 games to generate, if all goes the way it is now, update should be here quite quickly