Cardiff have slipped into the bottom three on the back of one win and only six goals in their last 11 league games.
"It's a huge challenge, but it's one of those games that you look at and there is no pressure on us," said Marshall.
"If we turn up and get done, like almost every other team has there this season, then no one is going to bat an eyelid.
"But we need to try and get the points. We've dropped into the bottom three and we do not want to get cut adrift in there."
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