Oslo Tennis Club, founded in 1900, is one of Norway's oldest tennis clubs with approximately 900 members. The club is based at Madserud, where there is easy access to public transport, with just a 500 meter walk from Skøyen station and 200 meters to Frognerparken. The facility includes eight clay courts, six of which are modern PlayClay courts with high drainage, as well as three hardcourt courts covered with bubble from 20 September to 20 April. The club also has a clubhouse, offices and changing rooms.
Oslo Tennis Club offers tennis for all ages and skill levels, with a varied program that includes fitness programs for both adults and children. Specialized courses such as Fit Tennis (Cardio) and tennis clinics for technique improvement are available, as well as kindergarten tennis for the youngest five-year-olds. The club also organizes camps for children and adults, with a focus on active lifestyles and social cohesion. A new construction project is planned for Oslo Tennisarena, and the club is collaborating with Grand Slam sponsor Los Tacos. Membership is required to book courses, but non-members can play with members for a fee.