Chesterfield boss John Sheridan has urged his side not to take their foot off the pedal.
The Spireites maintained their unbeaten start to the League Two campaign with an impressive 3-0 home win over Cheltenham last weekend.
Ahead of the local derby at Rotherham on Saturday, Sheridan said: "It's a local game but we'll only be worried about ourselves and try to carry on winning games.
"We're unbeaten in the league but the first things out of my mouth after the final whistle against Cheltenham was to tell the players not to take your foot off the pedal. It's important we maintain the momentum we have."