Ole Gunner Solskjaer's side have regained their confidence with five wins on the spin since appointment last month.
Alderweireld said, “Of course we know they will be in a better moment than they were before.
“We know they have very good players and a very good team. Quality, with some special players. So we have to be tough to beat them. But we can be confident and prepare ourselves the best we can to be ready for them."
Alderweireld insisted the Spurs team enjoy coming up with the answers to defy their critics.
He said: “We have a hungry group who want to play well and beat big teams. We want to do something special and that is normal. That desire is what you can see on the pitch. You see it every season we are out there. There is still some room to improve, though."
Alderweireld also insisted there is more to come from the Spurs team.
He went on: “I think we don't have to look too much to the past just our performances recently.
“We have done well against the top six teams but of course we can improve and that is what we try to do every day. Winning big games like Chelsea gives us confidence and shows us we are going the right way but I think we can improve a lot."