Pro Tennis Championships was a men's tennis tournament played on outdoor hard court at the Longwood Cricket Club in Chestnut Hill, Massachusetts in the United States.

The event was classified as a Group B category tournament and was part of the 1973 Grand Prix circuit.

Unseeded Jimmy Connors won the singles title and the accompanying $12,000 first prize money.

[3] Due to a rain-delay the final was played on Monday, July 24.

[4] Jimmy Connors defeated Arthur Ashe 6–3, 4–6, 6–4, 3–6, 6–2 Stan Smith / Erik van Dillen defeated Ismail El Shafei / Marty Riessen[5] 4–6, 6–4, 7–5