The 1973 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 1973 Commercial Union Assurance Grand Prix and of the 1973 WTA Tour.

The tournament was held from August 20 through August 26, 1973.

Tom Okker and Evonne Goolagong won the singles titles.

[4][5] Tom Okker defeated Manuel Orantes 6–3, 6–2, 6–1 Evonne Goolagong defeated Helga Niessen Masthoff 7–6, 6–4 Rod Laver / Ken Rosewall defeated Owen Davidson / John Newcombe 7–5, 7–6 Evonne Goolagong / Peggy Michel defeated Martina Navrátilová / Helga Niessen Masthoff 6–3, 6–2