Bradford are without a win in their last three games but Lambert knows they will dig in and come up with another 10% for the two-legged tie.
"Of course it will," he said. "It will be a different team to the one that got beaten by Barnet at the weekend. You have to withstand that and be ready for it.
"The Bradford lads will give it everything they have got to try to turn us over. If we do what we have been doing that of late and match that then we'll see what happens.
"It's always tough. Bradford have got nothing to lose and everything to gain. Obviously it is a two-legged affair. We'll go up there and we know it will be a really good atmosphere.
I've been up there before and it will be a tough game for us. But if we play we have been of late, we'll see."