But with Davies out with an Achilles injury, Knight knows he has the chance to impress boss Martin O'Neill again.
"Curtis will be breathing down my neck when he's back. The manager might bring in reinforcements but hopefully I will get the nod," he told the club website.
But he accepts that competition for places at the back was fierce.
"Before I signed, the manager asked me if I was up for the challenge because, at the time, he had three centre-halves and wanted to bring in Curtis," Knight explained. "But that's what I want. I'm confident in my ability and I have to keep on my toes because if I have a bad game someone else will be given the opportunity."