Former Wales great backs Rassie Erasmus' Springboks for historic World Cup three-peat

The Springboks matched the back-to-back achievement of New Zealand, in 2011 and 2015, when adding to their 2019 triumph in Japan with a successful title defence in France two years ago.

Since then, Rassie Erasmus' world beaters have won the Rugby Championship and will retain that title should they beat Argentina in the tournament finale at Twickenham on Saturday afternoon.

This, for many, has been the best ever edition of the tournament, with Australia winning spectacularly at Ellis Park, Argentina beating New Zealand in South America for the first time and the All Blacks extending their unbeaten record at Eden Park to 52 Tests and 31 years.

The Springboks look likely to come out on top, and few would argue with that given their last two performances. In Wellington they handed New Zealand their biggest ever defeat before Sacha Feinberg-Mngomezulu scored a South African record 37 points as the Boks crushed the Pumas 67-30 in Durban.

The second halves of those two games the Boks won by an aggregate of 78-10 - 36-0 against the All Blacks, 42-10 versus Argentina.

At Kings Park, the performance of Feinberg-Mngomezulu included three sensational tries. All Black fans will want to keep Dan Carter's virtuoso display against the 2005 British and Irish Lions on a pedestal all of its own but this was up there.

Erasmus' men still, of course, have 80 minutes to navigate and the Lions, Wallabies and All Blacks - all beaten by Los Pumas this year - will testify as to how dangerous Felipe Contepomi's side can be.

But the Green and Gold scored nine tries against the same opponents a week ago, are rated 11/1-ON to win again, and have the backing of Wales and Lions great Biggar to not only bag this trophy but go on to complete a World Cup hat-trick.

"The Springboks, at the minute, are the absolute benchmark," says Biggar, now a TNT Sports pundit. "They can win games any which way. The squad depth Erasmus has developed is such I would not back against them winning three [World Cups] on the spin."

READ MORE: Siya Kolisi focused on performance rather than records in London