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
- It was Năstase's 12th title of the year and the 28th of his career.
Evonne Goolagong defeated Virginia Wade 6–3, 6–1
- It was Goolagong's 8th title of the year and the 27th of her career.
Ilie Năstase / Ion Ţiriac defeated Jan Kodeš / Jan Kukal 7–6, 6–3
- It was Năstase's 13th title of the year and the 29th of his career. It was Ţiriac's 4th title of the year and the 10th of his career.
Margaret Court / Evonne Goolagong defeated Brenda Kirk / Pat Walkden 3–6, 6–3, 7–5
- It was Court's 4th title of the year and the 94th of her career. It was Goolagong's 9th title of the year and the 28th of her career.