The USTA Mixed Doubles League is for men and women 18 years of age and older with District, Sectional and National championships. Teams are developed with a combined rating of 6.0, 7.0, 8.0, 9.0, 10.0 for each doubles partnership. Total NTRP rating cannot exceed level of team (i.e., 7.0 team could be a combination of two 3.5 players, one 4.0 partner and one 3.0 partner or one player a 3.0 and partner a 3.5). The rating spread between partners may not exceed 1.0. Format consists of three doubles matches. Players from the Mixed 2011 Section Championship winning teams must be in compliance with the Local League Area Regulations, Move-Up Split Up rule, when planning to play in the 2012 Mixed League.
Each level team has an upper limit of skill level, and players with ratings above that level may not play on that team: