Millwall were defeated 1-0 by Huddersfield Town in the Sky Bet Championship at the John Smith's Stadium on Saturday afternoon.
Jonathan Hogg headed a late winner as The Lions suffered just a second defeat in 11 matches.
Gary Rowett made one change from the side which defeated Stoke City last weekend - an enforced one - as George Saville, back from suspension, replaced the injured George Evans.
The attacking trio of Mason Bennett, Matt Smith and Benik Afobe, meanwhile, took their places on the bench.
The Lions started the brighter in Yorkshire and fashioned a couple of chances through Jed Wallace, but Terriers goalkeeper Lee Nicholls was equal to them.
Lewis O'Brien, the hosts' biggest threat in the opening 45 minutes, then struck for goal, before a fantastic chance fell the way of Danny Ward as he took Sorba Thomas' cross in his stride, but he managed to blaze over from the edge of the six-yard box.
From there, The Terriers gained control of the game and tried to find a route to goal through a number of players, including Danel Sinani, Ward and Duane Holmes, but a combination of wayward shooting and strong hands from Bartosz Bialkowski prevented the score from being opened.
Billy Mitchell won the ball back in midfield as The Lions looked to hit their opponents on the break just before the half-time whistle, but Scott Malone's cross was easily gathered by Nicholls, with the teams going in at the break goalless.
Three minutes into the second-half, Bialkowski had to be on his usual fine form to save brilliantly from Matty Pearson's low drive, before Jed Wallace and former Lion Harry Toffolo traded chances as the hour-mark came and went.
With 66 minutes on the clock, Tom Bradshaw raced towards goal, but with Pearson chasing, the defender was able to execute an excellent challenge to prevent the Millwall man from pulling the trigger.
There were eight minutes left to play, however, when the scoring was opened as Hogg was able to rise highest and head past Bialkowski to open the scoring and condemn The Lions to a loss on the road.
Huddersfield Town: Nicholls, Toffolo, Pearson, Hogg, O'Brien, Thomas, Holmes (Campbell 78'), Sinani (Koroma 74'), Ward, Colwill (Turton 78'), Lees. Subs not used: Bilokapic, Aarons, High, Sarr.
Scorer: Hogg 82'
Booking: Koroma, Thomas, Campbell
Millwall: Bialkowski, Hutchinson, Cooper, J. Wallace, Bradshaw (Afobe 72'), Malone, Ojo (Kieftenbeld 46'), Saville, Leonard, B. Mitchell, Ballard (Smith 83'). Subs not used: Long, M. Wallace, Pearce, Bennett.
Booking: Saville, Leonard
Referee: Geoff Eltringham