Safa have also condemned the xenophobic attacks and the criminal looting of local and foreign-owned businesses that had been prevalent in parts of the country throughout the week.
Lions captain Ross Cronje said that final's rugby was a different ball game and believed he would embrace the atmosphere even though they were playing away.
The 31-year-old flanker, who will captain Australia in their final World Cup warm-up against Samoa in Sydney on Saturday, had already made it clear in May he would not be seeking a new contract with Rugby Australia.
The five-times world champion has a contract with the Silver Arrows until the end of next season, when the sport is due for a rules revolution.
South Africa ended their preparations for the Rugby World Cup with the perfect result as they beat Japan 41-7 in their final warm-up match before the tournament proper, which starts on 20 September.
Local fans were left high and dry on Wednesday after failing to secure tickets for the Roger Federer – Rafael Nadal Match In Africa 6 in Cape Town next February.
The Lions prop is replaced in the run-on 15 by Dylan Smith with Nathan McBeth coming onto the bench.
The cancellation comes on the back of Zambia also pulling out on a planned friendly they were due to play with South Africa on 7 September.
Abongile Nonkontwana and Gerhard Olivier switch places, with Oliver starting on number 6 flank.
Williams is seeking a 24th Grand Slam singles title to match Margaret Court's all-time record and will face either Belinda Bencic or Bianca Andreescu on Saturday in her bid for a record seventh US Open triumph.
