Mauricio Pochettino is expected to ring the changes at the Stadium of Light, having made 11 alterations for the 2-0 win against Bristol City in the third round. That side still included five senior internationals and highlights the strength in depth at the Argentinian's disposal.
"We've got a strong squad and an ambitious group of players which the manager and the chairman have put together, and we're all looking to play as many games as we can to progress," Davis told the Daily Echo.
"I think there's a genuine desire amongst all the lads to be in the first team and I think, with the results putting us in a different position, we're pushing all the time.
"I speak for myself and the other lads that get their chance in this competition that of course you want to do well and show the manager if any changes are needed then you're ready and you're prepared to wait for your opportunity.
"If you stay professional, then it's an opportunity for everyone who steps out on the pitch on Wednesday to do that."
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