Scunthorpe boss Nigel Adkins was delighted with his team's performance following the 1-1 draw at home to Southend.
The League One leaders needed a penalty in the 79th minute from Paul Hayes to stretch their unbeaten run to 12 games.
It had been threatened by a skilful Southend side, who snatched the lead in the 48th minute when leading marksman Lee Barnard headed home from a corner for his sixth goal of the season.
Adkins said: "Some of our attacking play was a joy to watch. We believe that Southend's goal should not have counted because Barnard was climbing all over one of our defenders.
"As for the penalty, I have seen it again on the video and their player has Mirfin in a headlock, so it was a spot-on decision by the officials.
"Southend are a good team and we can't be too disappointed to have taken just one point. But we created lots of chances and on another night might have had four or five goals."
Millwall boss Kenny Jackett was delighted with his side following the 2-1 victory over Colchester which saw them move into second place in League One.
First-half goals from Lewis Grabban and Paul Robinson gave the Lions a two-goal lead inside the opening quarter.
Jackett said: "It was a massive win for us. To go to a very good Colchester United side and win is a big achievement.
"Colchester have a very good squad and are one of the best teams in the league. Their midfield quartet is excellent and for us to win - especially after the Leeds game on Saturday - was excellent."
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