The Springboks will hold on to their number one ranking for this week, regardless of what happens in their huge game against Ireland on Saturday.
Springbok great Eben Etzebeth says the Boks are eager to rewrite history against Ireland in Dublin, a venue they haven't won at since 2012.
England have moved up to third place in the latest World Rugby rankings, ahead of Ireland who also won over the weekend.
Japan head coach Eddie Jones says the frequency and severity of sanctions being handed out to players during international matches is getting out of hand.
Ireland claimed their record-biggest win over Australia, while there were also wins for Wales and France in international Test rugby action on Saturday.
Two late tries from the All Blacks helped them secure a 26-13 win over Ireland at a sold-out Soldier Field in Chicago on Saturday night.