This article concerns a game that is unreleased. Some details may be speculative, and may turn out to be incorrect.
"Tennis is a very competitive sport that hasn't changed much since the 1800s. It is still an obsession of angry upper class swingers who like to sit in the stands, drink wine, and complain about diversity."
―GTA V Website
Tennis, is an activity in GTA V. It was mentioned as one of the available minigames that was to be featured in GTA V