The 1972 Rothmans Canadian Open was a tennis tournament played on outdoor clay courts at the National Tennis Centre in Toronto in Canada that was part of the 1972 Commercial Union Assurance Grand Prix The men's tournament was categorized as a Grade A tournament, the second-highest category, while the women's competition was a Grade D event. The tournament was held from August 14 through August 20, 1972. Ilie Năstase and Evonne Goolagong won the singles titles.

Ilie Năstase defeated Andrew Pattison 6–4, 6–3

Evonne Goolagong defeated Virginia Wade 6–3, 6–1