Try or die! Springboks ready to rock London

SA eye back-to-back Championship crowns

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South Africa fly-half Sacha Feinberg-Mngomezulu celebrates after scoring a try against Argentina in Durban last Saturday. AFP

(AFP)

South Africa are firm favourites to wrap up a second straight Rugby Championship title for the first time when they face Argentina at Twickenham today in a competition with an uncertain future.

This year's tournament has been one of the most exciting and unpredictable since Argentina joined South Africa, New Zealand and Australia in the competition in 2012.

The Springboks top the table by a single point heading into the sixth and final round of matches this weekend.

A bonus-point victory against the Pumas in London would guarantee the world champions retain the trophy for the first time regardless of the result in Perth between Australia and New Zealand earlier today.

The All Blacks can still emerge victorious if results go their way, though South Africa have a huge pointsdifference advantage. Australia are rank outsiders.