Anthony Seibold will leave a decision about when Greg Inglis returns to fullback in the hands of the Rabbitohs superstar, claiming the Australian and Queensland representative won't be condemned to the centres for the rest of his career.

The rookie Rabbitohs coach confirmed there was no chance of Inglis spending time at fullback in his first NRL game for a year when South Sydney clash with the Warriors in Perth on Saturday.

But he gave the strongest hint Alex Johnston's grip on the No.1 was only a temporary one with Inglis just needing to give his coach the nod to revert to his customary position.

"Once Greg comes to me and says, 'listen, I want to move back to fullback [then he'll move]'," Seibold said at a promotion for the opening weekend double header at Optus Stadium. "That would be fair indication.

"We're not looking too far ahead and Alex Johnston has had a good pre-season for us and we're really comfortable with him being there at the moment. Until at some stage Greg comes and has a chat and says he's ready to go back there we'll see how the conversation goes then.