MILLWALL are currently on a 15-game unbeaten league run, but they have drawn seven out of 12 League One games since the turn of the year.
Neil Harris' side were frustrated at full-time after dropping out of the play-offs following a 0-0 draw with Bury at The Den on Saturday.
Rochdale defeated Gillingham 4-1 on Saturday – their first win in 12 games – and will be hoping to carry on in that vein against a Millwall side who have only conceded one league goal in 10 games.
The football world has pulled together in recent days after Rochdale midfielder Joe Thompson was diagnosed with cancer for the second time.
Lucas Ball spoke to Rochdale fan Daniel Gardiner ahead of Tuesday night's all-important clash.
Why do you support Rochdale?: It stretches back two generations at least. My nan used to take my dad to games and 15 years ago my dad started taking me. I've been a season ticket holder for 12 years and wouldn't have it any other way.
After a 4-1 win over Gillingham, do you think Rochdale can reach the play-offs?: The win against Gillingham was our first in 12 games.
We've been playing well in those games and have been unlucky. If we beat Millwall, we'll be four points off the play-offs with two games in hand on some. A win against Millwall is a must if we have top-six aspirations.
Rochdale won 3-2 at The Den in September, how much has changed since then?: That was only our second win of the season and after that we won five games in a row and 10 consecutive home games.
Our season has stalled somewhat in 2017 but playing Millwall is another chance to kick-start a good run.
Who are Rochdale's most in-form players?: Nathaniel Mendez-Laing, Harrison Mcgahey and Calvin Andrew are probably our most dangerous players at the moment.
They've played well even given our current run, but it's going to be tough on Tuesday night.
Who do you think could cause Rochdale problems from the Millwall side?: I understand Lee Gregory and Steve Morison have a solid partnership at this level.
Shaun Cummings scored a great goal against Leicester, and has played decently since returning from injury. You have some good players to come from the bench that could stretch the game late on.
Finally, a score prediction?: This is a big game for us and we probably need a win to keep our season alive. I'm going to go for a 1-0 Rochdale win.