Tamika Mkandawire scored a controversial goal as Millwall beat League Two Morecambe in the Carling Cup second round.
Morecambe players were expecting the home side to put the ball out of play when Millwall's John Marquis lay injured in the box.
But Mkandawire carried on to make it 2-0 on the stroke of half-time.
Hamer Bouazza put the Lions ahead with a stunning 30-yard freekick.
Morecambe had dumped Barnsley out in the previous round in a 2-0 success at Oakwell and arrived in the capital on the back of three successive league wins. But they never really threatened to pull off a repeat.
The Shrimps did go close inside the second minute when striker Danny Carlton hit an 18-yard shot which flashed narrowly wide - but then the home side took control.
Bouazza's shot from 12 yards was well saved from visiting goalkeeper Barry Roche, and Josh McQuoid also went close from a corner.
Bouazza did find the target though on 34 minutes, sending a superb left-footed free-kick into the top corner from 25 yards.
The second goal arrived - controversially - in first-half stoppage time.
Chris Hackett found Mkandawire with a fine pass and the Lions midfielder hit a right-footed shot into the net from 20 yards despite his own player - John Marquis lying injured in the box. Morecambe players had expected Millwall to put the ball out of play so Marquis could be treated.
Roche kept the score down after the break with several stops, most notably from McQuoid, as the Lions held on with relative comfort.