Tottenham boss Antonio Conte is unsure what to expect from West Ham.
West Ham's Thursday night exertions - where they beat Sevilla in extra-time - are sure to play a part, but Conte does not know if it will be a negative or positive effect.
"I can answer you after the game and tell you how the Sevilla game affects the game against us. For sure, on one hand they played 120 minutes but when you get this type of result it gives you confidence, enthusiasm and strength," he said.
"For sure, it'll be a really tough game for both teams. We're in the same position and we have the same target.
"It's a derby and don't forget that a derby is always difficult, but I think that my team, we are now in a good moment of form. We are improving a lot. We try to do everything to get three points.
"It would be very important to have a fantastic atmosphere around us in the stadium. Our fans, they have to play an important part in the game.
"Like all the other games, they can help us by pushing us from the start until the end, to create a fantastic atmosphere around us. It'll be very important for us."
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