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.

Finals

Men's singles

🇸🇪 Björn Borg defeated 🇺🇸 John McEnroe 6–3, 6–3

Women's singles

🇺🇸 Laura DuPont defeated Brigitte Cuypers 6–4, 6–7, 6–1

Men's doubles

🇺🇸 Peter Fleming / 🇺🇸 John McEnroe defeated Heinz Günthardt / Bob Hewitt 6–7, 7–6, 6–1

Women's doubles

🇺🇸 Lea Antonoplis / 🇦🇺 Diane Evers defeated 🇦🇺 Chris O'Neil / 🇸🇪 Mimmi Wikstedt 2–6, 6–1, 6–3