The 27-year-old, who earned a recall to the team despite missing eight months with a shoulder injury, could return for the latter stages of the competition.
"The win against New Zealand was massive for England as a whole in terms of restoring faith and giving the boys confidence. Going into the Six Nations there will be a lot of pressure on them," said Croft.
"After that win they will be expected to go well and in that first game against Scotland will expect a big show, with hopefully the right result going our way."
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