Keeper Keiren Westwood is rated at only 50-50 as he attempts to shake off the after-effects of his collision with Tigers' defender Paul McShane at the weekend.
Gus Poyet: "I try not to put it on a different level to anything, not because I want to give it more or less importance because we need to keep improving.
"We need to keep getting better. We need plenty of things, we need to do better for longer periods during the game, not only 45 minutes.
"It's another game, another important test against a very good team, so use it as another step forward. It's quite important.
"I know if you put in the balance would you prefer to win on Sunday... That's too easy.
"I don't know what is going to happen tomorrow, I don't know what is going to happen on Sunday. First things first - let's play tomorrow and try to win tomorrow."