1979 ATP Championship

The 1979 ATP Championship, also known as the Cincinnati Open, 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 1979 Colgate-Palmolive Grand Prix. It was the 79th edition of the tournament and was held from August 20 through August 26, 1979. Seventh-seeded Peter Fleming won the singles title.

Singles
🇺🇸 Peter Fleming defeated 🇺🇸 Roscoe Tanner 6–4, 6–2
 * It was Fleming's 1st singles title of the year and the 2nd of his career.

Doubles
🇺🇸 Brian Gottfried / Ilie Năstase defeated 🇺🇸 Bob Lutz / 🇺🇸 Stan Smith 1–6, 6–3, 7–6