Springbok lock Eben Etzebeth makes a tackle on All Blacks loose forward Wallace Sititi in Soweto this past Saturday. The Bok veteran feels playing four back-to-back Tests against New Zealand is one of the toughest challenges in rugby.

The Rugby World Cup remains the pinnacle for the Springboks, but even that global showpiece does not demand four straight Tests against the All Blacks.

That is what makes this Rugby’s Greatest Rivalry series such a brutal examination — and, according to veteran Springbok lock Eben Etzebeth, one of the toughest challenges in rugby.

With the Boks leading 2-1, they can make history by clinching the inaugural title with a third straight victory over their arch-rivals in Saturday evening’s Baltimore finale (11.10pm kick-off SA time).

The All Blacks, meanwhile, have one last chance to salvage some pride at M&T Stadium and deny the world champions a series triumph. After starting the Dave Rennie coaching era with a flawless record, they’ve now lost twice in a row.