The CTA offers league play with...
San Diego Fall/Winter League http://www.sdleaguetennis.net/team.php
World Team Tennis (WTT) http://www.wtt.com/community
San Diego USTA League information http://www.sandiegotennis.com/leagues
United State Tennis Association (USTA) https://tennislink.usta.com/Leagues/Common/Default.aspx
San Diego District Tennis Association (SDDTA) https://www.sandiegotennis.com/
CTA membership is required to participate and at least 50% of the players must be residents of Coronado.
What's the Call? Great info on tennis rules
Friend at Court. Full rules.