Match ends, Grimsby Town 1, Southport 0.
Padraig Amond scored his 27th goal of the season to hand Grimsby a narrow win over Southport at Blundell Park.
The 28-year-old striker netted after just a minute, bundling in the ball after Toto Nsiala's header came back off the post.
Steven Hewitt's second-half effort forced home keeper James McKeown into an impressive save as Grimsby hung on.
Victory saw the Mariners move to within 10 points of second-placed Forest Green in the National League.
Grimsby Town manager Paul Hurst told BBC Radio Humberside:
"A great three points on the back of Friday night. We couldn't have got off to a better start and I thought for the first 15 minutes we were excellent but fair play to Southport I thought they came back into it.
"The lads stood strong and it's a really good three points for us.
"We won the game and it's just a case of us trying to keep our shape and discipline which was good. We've just got to try and look after the ball better."
- 6GowlingBooked at 44mins
- 31NolanSubstituted forClayat 67'minutes
- 11MonkhouseSubstituted forJenningsat 71'minutes
- 10AmondSubstituted forEastat 90+2'minutes
- 20O'BrienBooked at 75mins
- 12BlakemanSubstituted forPhenixat 67'minutes
- 23HewittSubstituted forBishopat 90+2'minutes
- 7AllenSubstituted forAlmondat 82'minutes
- Ryan Johnson
- Shots on Target
Second Half ends, Grimsby Town 1, Southport 0.
Attempt blocked. Louis Almond (Southport) right footed shot from outside the box is blocked.
Foul by Craig Clay (Grimsby Town).
Louis Almond (Southport) wins a free kick.
Foul by Ryan Jennings (Grimsby Town).
Liam Nolan (Southport) wins a free kick.
Substitution, Grimsby Town. Danny East replaces Padraig Amond.
Substitution, Southport. Andy Bishop replaces Steven Hewitt.
Attempt saved. Padraig Amond (Grimsby Town) header from the centre of the box is saved. Assisted by Evan Horwood with a cross.
Foul by Louis Almond (Southport).
Craig Disley (Grimsby Town) wins a free kick.
Corner, Grimsby Town.
Offside, Southport. Craig Westcarr tries a through ball, but Craig Westcarr is caught offside.
Substitution, Southport. Louis Almond replaces Jamie Allen.
Offside, Grimsby Town. Padraig Amond tries a through ball, but Padraig Amond is caught offside.
Offside, Southport. Jamie Allen tries a through ball, but Jamie Allen is caught offside.
Attempt saved. Liam Nolan (Southport) right footed shot from the centre of the box is saved. Assisted by Steven Hewitt.
Foul by Evan Horwood (Grimsby Town).