Pro Tennis Championships was a men's tennis tournament played on outdoor green clay courts (Har-Tru) at the Longwood Cricket Club in Chestnut Hill, Massachusetts in the United States.

It was classified as a Group AA category tournament and was part of the 1974 Grand Prix circuit.

Fourth-seeded Björn Borg won the singles title and the accompanying $16,000 first prize money.

[5] With his victory Borg became the youngest winner of the US Pro Championships at 18 years and two months, surpassing title-holder Jimmy Connors who did not defend his title but instead elected to play the Eastern Grass Court Championships in preparation for the US Open.

After the final, which was watched by a crowd of almost 6,000, Okker commented "This was the first time I've played Björn Borg and at the moment I'm hoping it will be the last!".