The Springboks have risen to third in the World Rugby rankings following Ireland's 21-13 defeat against England in London.
The top three now are the All Blacks, Wallabies and Boks.
Ireland were debited 0.79 of a rating point after a second successive loss this past weekend, prompting their relegation from third to sixth in the rankings – below the Boks, England and Wales.
England climbed to fourth position on 85.04 points, 0.41 of a point adrift of Wales.
Japan gained 0.91 of a point, which moved them one place up to 13th, on the back of a 13-10 win over Georgia in Gloucester.
The defeat sees the Lelos slip to 16th, below Italy and the USA who are promoted to 14th and 15th position respectively.
World Rugby rankings (Top 15):
1. New Zealand 92.89
2. Australia 86.67
3. South Africa 85.15
4. England 85.04
5. Wales 84.63
6. Ireland 84.40
7. France 81.12
8. Argentina 78.39
9. Fiji 77.04
10. Scotland 75.88
11. Tonga 75.69
12. Samoa 75.14
13. Japan 72.06
14. Italy 70.53
15. USA 70.36
Full rankings
How the rankings work
Photo: Gabriel Rossi/Gallo Images