Rochdale and Millwall meet for only the 12th time this Tuesday night (kick-off 7.45pm) in a crucial Sky Bet League One encounter.
With both sides sitting just outside the top six in the League table, three points for either side could prove pivotal in their chase for a Play-Off place.
The Lions extended their unbeaten run in the League to 15 games last Saturday after a goalless draw against Bury, but now face three away games on the spin before they return to The Den on 1st April against Scunthorpe United.
Rochdale, meanwhile, were winless in 10 games prior to hosting Gillingham last weekend, but goals from Nathaniel Mendez-Laing, Ian Henderson, Callum Camps and ex-Lion Peter Vincenti consigned that run to the past in a 4-1 victory.
The 2015/16 campaign saw the two clubs meet for the first time in over 50 years, with Neil Harris' side clinching the double over the Spotland outfit.
At The Den in late September, Jimmy Abdou, Shaun Williams and Steve Morison were on target in a 3-1 win, whilst in the reverse fixture in February, Lee Gregory poked home the only goal of the game to keep Millwall's promotion charge on track.
The Lions will head to Spotland looking to avenge a cruel defeat earlier in the current season. Camps gave the visitors an early lead, but Aiden O'Brien and Gregory (pen) turned the game on its head within nine minutes.
However, Calvin Andrew levelled proceedings on 67 minutes and after Ben Thompson was shown a red card seven minutes later, Rochdale would go on to take all three points through Henderson's 90th minute penalty-kick.
Should The Lions claim all three points in OL11 on Tuesday night, it will be their 7th victory over their opponents.
The first came in the inaugural meeting, as Millwall won 1-0, with Alf Ackerman and Barry Pierce netting in a 2-0 success later on that season.
There have been two draws, whilst Rochdale have been victorious on three occasions.