Ahead of Saturday's trip to Roots Hall, we take a look back at when the two sides met earlier in the season...
Dale were 3-0 winners over the Shrimpers at the Crown Oil Arena in October, recording a sixth straight win in all competitions
Goals from Niall Canavan and Calvin Andrew gave Dale a half-time lead, before Nathaniel Mendez-Laing made sure of the points with six minutes left to play.
You can watch the goals again by clicking through on the embedded YouTube link above.
Dale XI: Lillis, Rafferty, Keane, Canavan, Bunney, Camps, Morley, Cannon, Thompson, Andrew, Davies. Subs: Logan, McGahey, Mendez-Laing, McDermott, Rathbone, Odelusi, Noble-Lazarus.