Chelsea boss Antonio Conte has urged the club fans to be on their best behaviour in the EFL Cup tie against West Ham United on Wednesday night.
More than 5,000 Chelsea fans are expected to travel to the London Stadium for the fourth-round clash between the London rivals.
The Hammers' new home has already witnessed multiple crowd troubles this season, and this fixture has been put in the high-risk category.
"I have always appreciated the behaviour of our fans when we have played away, in every single moment," said Chelsea manager Conte.
"When we were losing 2-0 against Leicester after 20 minutes in the last round, they pushed us and are always behind us. That is very important.
"I want that again tonight but only that."