The 1970 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 1970 Pepsi-Cola Grand Prix. The men's tournament was held from August 12 through August 18, 1970 while the women's tournament was played from August 19 through August 25, 1970.
Rod Laver defeated Roger Taylor 6–0, 4–6, 6–3
- It was Laver's 6th professional title of the year and the 17th of his career.
Margaret Court defeated Rosemary Casals 6–8, 6–4, 6–4
- It was Court's 27th professional title of the year and the 77th of her career.
William Bowrey / Marty Riessen defeated Cliff Drysdale / Fred Stolle 6–3, 6–2
- It was Bowrey's 2nd title of the year and the 4th of his career. It was Riessen's 3rd title of the year and the 8th of his professional career.
Rosemary Casals / Margaret Court defeated Evonne Goolagong / Pat Walkden 6–0, 6–1
- It was Casals' 6th title of the year and the 13th of her career. It was Court's 28th professional title of the year and the 78th of her career.