The 1979 Player's International Canadian Open was a tennis tournament played on outdoor hard courts at the National Tennis Centre in Toronto in Canada that was part of the 1979 Colgate-Palmolive Grand Prix and of the 1979 WTA Tour. The tournament was held from August 13 through August 19, 1979.
Björn Borg defeated John McEnroe 6–3, 6–3
Laura DuPont defeated Brigitte Cuypers 6–4, 6–7, 6–1
Peter Fleming / John McEnroe defeated Heinz Günthardt / Bob Hewitt 6–7, 7–6, 6–1
Lea Antonoplis / Diane Evers defeated Chris O'Neil / Mimmi Wikstedt 2–6, 6–1, 6–3