DSV Concordia is a multi-sport club based in Delft, Netherlands, founded in 1885. The club offers four official sports - cricket, football, golf, and tennis - with a membership philosophy that balances recreational play and competitive performance.The club has a notable sporting heritage. It introduced Jan Thomée, who became the leading football goal scorer for the Netherlands and represented the Dutch team at the 1908 Summer Olympics, where they won the bronze medal. Thomée played for Concordia between 1906 and 1912. The club maintains strong traditions, including a distinctive club chant connected to one of its most influential former chairmen who served the organization for 18 years.
Delft Tennis Federation (DTB) is located in Delft, a historic city in South Holland, Netherlands, positioned between Rotterdam and The Hague. The club operates as a community tennis facility serving both members and non-members through its 13 private tennis courts.The facility offers a tennis school with dedicated youth programs and coaching. DTB hosts competitive play across multiple levels, including youth and senior competitions during spring and autumn seasons, as well as casual play opportunities. The club provides court access via the KNLTB Meet & Play app for non-members booking outside peak hours, and maintains a clubhouse with a bar and catering services. The grounds feature both indoor facilities (including a balloon hall) and outdoor gravel courts.
Tennishal Koos Heiligers is an indoor tennis facility located in Delft, Netherlands. The hall specializes in court rental without membership requirements, making it accessible to casual players and those seeking hourly bookings. Court reservations are managed through the KNLTB Meet & Play system. The facility features two artificial grass courts designed with joint-friendly surfaces that offer the playing characteristics of gravel courts. The courts have a low pile and minimal sand content, resulting in consistent high ball bounce. Beyond hourly court rental, Tennishal Koos Heiligers offers tennis lessons through an on-site tennis school, 26-week court passes, strip cards for 10 hours of play, themed Saturday lessons focusing on specific strokes, weekend doubles tournaments, and a winter competition series.