The 1971 Rothmans Canadian Open was a tennis tournament played on outdoor clay courts at the Toronto Lawn Tennis Club[3] in Toronto in Canada that was part of the 1971 World Championship Tennis circuit.

The tournament was held from August 9 through August 16, 1971.

John Newcombe and Françoise Dürr won the singles titles.

John Newcombe defeated Tom Okker 7–6, 3–6, 6–2, 7–6 Françoise Dürr defeated Evonne Goolagong 6–4, 6–2 Tom Okker / Marty Riessen defeated Arthur Ashe / Dennis Ralston 6–3, 6–3, 6–1 Rosemary Casals / Françoise Dürr defeated Lesley Turner Bowrey / Evonne Goolagong 6–3, 6–2