1977 South African Open
Date	28 November – 6 December
Edition	74th
Category	Grand Prix (5 Star) (M) Colgate series (W)
Draw	32S / 16D
Prize money	$150,000 (M) $35,000 (W)
Surface	Hard / outdoor
Location	Johannesburg, South Africa
Venue	Ellis Park Tennis Stadium
Champions
Men's singles
Guillermo Vilas[1]
Women's singles
Linky Boshoff
Men's doubles
Bob Lutz / Stan Smith[2]
Women's doubles
Ilana Kloss / Linky Boshoff
Mixed doubles
Linky Boshoff / Colin Dowdeswell
← 1976 · South African Open · 1978 →

The 1977 South African Open, also known by its sponsored name SAB Open, was a combined men's and women's tennis tournament played on outdoor hard courts in Johannesburg, South Africa. The men's tournament was part of the 1977 Colgate-Palmolive Grand Prix while the women's event was part of the 1977–1978 Colgate International Series. It was the 74th edition of the tournament and was held from 28 November through 6 December 1977. Guillermo Vilas and Linky Boshoff won the singles titles.^[3][4]

Guillermo Vilas defeated Buster Mottram 7–6, 6–3, 6–4

Linky Boshoff defeated Brigitte Cuypers 6–1, 6–4

Bob Lutz / Stan Smith defeated Peter Fleming / Raymond Moore 6–3, 7–5, 6–7, 7–6

Ilana Kloss / Linky Boshoff defeated Brigitte Cuypers / Marise Kruger 5–7, 6–3, 6–3

Linky Boshoff / Colin Dowdeswell defeated Ilana Kloss / Sherwood Stewart 6–4, 4–6. 7–5

• ITF – Johannesburg tournament details