The Island on Lake Travis has two lighted tennis courts for the exclusive use of property owners and their rental guests.
The courts may be used on a first come / first served basis. Other Tennis facilities are listed below:

Lago Vista Tennis
A list of tennis facilities in Lago Vista and surrounding areas.
Location: Lago Vista, Texas
Url: View Website

Lakeway Tennis
The scenic Texas Hill Country is the setting for the World of Tennis Sports Complex, which has offered a world-class tennis experience since 1973. Tennis legends such as Jimmy Connors, Rod Laver, Billie Jean King, Chris Evert and Martina Navratilova competed on the stadium court during the early years, and more recently, Pete Sampras, Todd Martin, Jim Courier and others.
Location: Lakeway, Texas
Url: View Website