Millers on Gills mission
The match at the Priestfield Stadium completes a run of four games in 11 days after wins against Southend and Accrington and Saturday's draw at Burton.
Victory would put further distance between the Millers and another of their League Two play-off rivals, with Gillingham three points behind in the league table having lost their last six games.
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Hide AdScott said: "We've picked up seven points in a week so let's go and get another three tonight. It's another match and the more the merrier.
"There's a mentality in the group now that we want to get out there and play and after how well we did in the second half on Saturday, they want to show that for 90 minutes this time.
"We want the three points to keep putting the teams ahead of us under a bit of pressure."
Kick-off is 7.45pm.