While Cronk is now expected to make his comeback next Friday night against Brisbane, Robinson refused to name his 2018 grand final hero’s replacement.
Luke Keary shifted to halfback against Manly last week, with Latrell Mitchell shifting to five-eighth, Mitch Aubusson starting in the centres and young gun Lachie Lam impressing off the bench.
Robinson will wait until an hour before kick-off at ANZ Stadium before declaring his hand.
“The rules are there in place and I look to keep that to myself, or the team at least,” he said. “I don’t think we need to give advantages. We’ll name our 19 tonight, obviously with the bit where Cooper’s out, but I know it, the team knows it and we’ll see on Friday night.”