It was held on outdoor hard courts at the Dwight Davis Tennis Center in Forest Park in St. Louis, Missouri in the United States.

The singles finalists then had to travel to New York to compete in the Tennis Champions Classic before returning.

Due to persistent bad weather the singles final was played indoor at the Washington University Field House on June 4, 1970.

First-seeded Rod Laver won the singles title and earned $8,000 first-prize money.

[3][4] The doubles finalists Andrés Gimeno and John Newcombe had to travel to Casablanca, Morocco for the Moroccan Pro Championships and their final was rescheduled and played on August 24, 1970.