South Sydney captain Sam Burgess is a certain starter for Sunday's pivotal NRL clash with Penrith.

Burgess's inclusion is huge for a Rabbitohs side in 12th spot on the NRL ladder, six points behind eighth-placed Parramatta, after he missed one match with a glute strain.

"He's fine. He trained all week and he's come back and playing on Sunday," South Sydney coach Michael Maguire said on Friday.

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