MILLWALL'S three-match unbeaten run was brought to a shuddering halt by bogey side Watford.
The Lions went into the game full of confidence on the back of recent wins against Dagenham & Redbridge and Barnsley, in addition to a respectable draw against Southampton on Saturday, but were undone by two goals either side of half time.
First, Troy Deeney drilled home from the edge of the area in the 35th minute following neat build-up play from Fulham loanee Alex Kacaniklic, before Joe Garner tapped-in from close range shortly after the restart to put the visitors in control.
Millwall were unconvincing in front of goal all evening, and, after Liam Trotter's second-half header hit the post, Darius Henderson saw his last-minute penalty well-saved by 'keeper Scott Loach to compound the Lions' misery.
Kenny Jackett's side, who have now lost their last four matches against the Hornets, missed the chance to pull clear of relegation rivals Nottingham Forest, who were beaten 2-0 by Burnley.
Millwall: Forde, Smith, Barron, Abdou, Ward, Craig, Mason (Hackett, 56mins), Trotter, Henderson, Kane (Marquis, 56mins), Feeney.
Watford: Loach, Hodson, Eustace, Mariappa, Deeney, Doyley, Kacaniklic (Iwelumo, 75mins), Murray, Garner, Hogg, Nosworthy.