1983 ATP Championship

The 1983 ATP Championship, also known as the ATP Championships, was a men's tennis tournament played on outdoor hard courts at the Lindner Family Tennis Center in Mason, Ohio in the United States that was part of the 1983 Volvo Grand Prix. The tournament was held from August 20 through August 26, 1983. Fourth-seeded Mats Wilander won the singles title.

Singles
🇸🇪 Mats Wilander defeated 🇺🇸 John McEnroe 6–4, 6–4
 * It was Wilander's 5th singles title of the year and the 9th of his career.

Doubles
🇺🇸 Victor Amaya / 🇺🇸 Tim Gullikson defeated 🇧🇷 Carlos Kirmayr / 🇧🇷 Cássio Motta 6–4, 6–3