Derby's Bradley Johnson has insisted that his side will not be complacent against strugglers Rotherham.
The Rams are unbeaten in eight matches as they prepare to take on the second-bottom Millers.
"Rotherham, no disrespect to them, will see coming to the iPro, as one of their biggest game," he told BBC Radio Derby.
"It is one of those where we can't take our foot off the pedal and think we can turn up and win the game, because it does not work that way in this league."
The 28-year-old, signed from Norwich during the summer, added: "There are a lot of upsets in the league and we do not want to be the team that are upset this week.
"We have got to work hard, stick together and show we are team who can fight and play our football."
Derby, who are just a point off the automatic promotion places, face three games in seven days, with the East Midlands derby against Nottingham Forest the last of those three, on 6 November.
However, Johnson said: "You can't look too far ahead. If you lose the first game in front of you the other games don't matter.
"We are concentrating on Saturday and winning."