Shaun Batt enjoyed a dream debut by firing Millwall into the League One play-off places with a 2-0 victory over Southend.
The 22-year-old, who signed on loan from Championship outfit Peterborough United 24 hours before kick-off, netted after 64 minutes to put the hosts in control at The Den.
Winger Danny Schofield had already put the Lions ahead in the dying moments of the first half before Batt's strike killed off any hopes of a Southend comeback.
Millwall should have scored inside the first 30 seconds but Steve Morison could only head Chris Hackett's cross from the right over the bar.
The Shrimpers threatened briefly when Matt Paterson shot over the upright six minutes later following good play from Franck Moussa.
But Lions winger Schofield made no mistake in first-half stoppage time when he pounced on Jack Smith's mishit shot and fired the ball home from six yards.
And Batt marked his first appearance for the club by shooting high past Southend goalkeeper to continue Millwall's unbeaten league start to 2010.
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