Full-time: Lincoln City 1 Southport 0
Gary Simpson crowned his first home game in charge of Lincoln City with a priceless three points against Southport in a game overshadowed by two red cards.
The Imps had taken the lead in the 14th minute when Jamie Taylor was bundled over in the box by Aaron Chalmers allowing Alan Power to stroke home from the spot.
But back came Southport and they wasted a glorious chance to equalise when Shaun Whalley, who was exceptional throughout, saw his spot-kick saved by Paul Farman.
In the second half, chances were limited for both sides which were both reduced to 10 men late on when Vadaine Oliver and Neill Byrne got involved in an altercation.
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Southport went for broke at the end and nearly hauled themselves level when Whalley cracked the foot of the post with a 25-yard free-kick.
But despite a late surge it was not enough to deny the Imps, who sealed only their third win since December.