Leeds United head coach Daniel Farke says his team will be ready for the test from an “in your face” Millwall team.
The Whites head to south London on Wednesday (19:45 GMT) to take on the in-form Lions.
Leeds sit second in the Championship, unbeaten in eight games, but Millwall have climbed to seventh on the back of three straight wins.
“Millwall are an in-your-face team, they go for it, they will attack, chase and play brave,” Farke told BBC Radio Leeds.
Traditionally, fixtures at The Den have been challenging for Leeds, with just two wins in their last 12 visits, although one of those came in September 2023 under Farke.
They will face a Millwall side who are unbeaten in five games and have conceded just one goal in that time – they enjoyed a notable win against Burnley on Sunday.
Farke needs his players to cope with the heat of the occasion and the test posed on the pitch by Neil Harris’ side to succeed.
“There can be a hostile, spicy atmosphere but that’s what you like as a player,” he said.
“You rise and don’t crack under this pressure. At least, that’s what I expect from my players.
“Of course it’s a tough place to go but we must find the balance between keeping our nerve and playing with fire in our hearts.”