Millwall sent Arsenal's Carling Cup conquerors Ipswich Town crashing back down to earth with a gutsy victory at The Den.
Kenny Jackett's bravehearts extended their unbeaten run to nine Championship games and made it a miserable return to management for Paul Jewell, taking charge of the Tractor Boys for the first time.
Tamas Priskin fired Town ahead on 25 minutes, only for Danny Schofield's superb 45th-minute strike and Steve Morison's close-range finish to secure victory 14 minutes from time.
This might not have been the prettiest of displays, but for sheer determination, persistence and a will to win, The Lions took the honours.
Despite missing six first team players, and then having to shuffle his defensive pack when Tony Craig failed to reappear for the second-half, Jackett's men dug even deeper, showing tremendous resolve.
"It was a fantastic performance considering the circumstances with injuries," said Jackett. "It's a credit to the players involved and good to keep the run going.
We looked wobbly after their goal but Danny Schofield's equaliser was crucial. In the second half it settled us down and we looked very strong. We were good value for the three points."
The first-half was played at a frantic pace with each team scoring one goal apiece - and missing an absolute sitter too.
Ipswich took the lead on 25 minutes courtesy of Priskin's arrowed finish that bobbled in off the back post after keeper David Forde had sprinted off his line to try reduce the angle.
Ten minutes later visiting keeper Martin Fulop needlessly pushed James Henry's routine delivery over for a corner, clearly took umbrage at a comment made by Mark Kennedy and appeared to lean forward with his head and make contact with his team-mate.
Despite the howls of protest from the home supporters demanding that Fulop be shown a red card, referee Iain Williamson merely gave the keeper a stern talking to.
On 37 minutes Jaime Peters' shot cannoned off the woodwork and fell for the unmarked Priskin who fired high over the bar from around six yards.
The Lions responded immediately and it took a flying save from Fulop to parry Morison's drive for another corner.
Millwall kept plugging away and grabbed an equaliser on 45 minutes with a pearler from Schofield, latching on to Neil Harris' flick and despatching a sizzling 22-yard strike that whistled into the bottom right corner.
Morison spurned a glorious opportunity to put Millwall 2-1 ahead in injury-time, contriving to blaze over the bar with the goal at his mercy following a great cross by Harris.
The appearance of Chris Hackett at the start of the second-half for centre half Craig saw Jack Smith move across to partner Darren Ward and Alan Dunne drop from midfield to fill the vacant right-back berth with Hackett coming into the centre of the park.
Morison saw an early effort blocked and then Scott Barron was denied a goal against his former club with a curling free-kick that Fulop scurried across goal to divert for a corner.
Schofield had a low effort saved whilst Morison and Hackett had efforts charged down as The Lions continued to press.
At the other end a sliding tackle from Barron averted the danger as Connor Wickham broke into the danger zone.
Millwall maintained sustained pressure against a tiring Ipswich side and were duly rewarded 14 minutes from time when Morison was the only man to react as Hackett curled in a left foot cross, leaving the striker unchallenged to stretch out a leg and divert the ball into the bottom corner for what proved to be the winner.
Theo Robinson, on as a substitute for Neil Harris who had been influential for an hour, threatened to cause the Tractor Boys further embarrassment with his pace.
But it was Lions keeper Forde who secured the points late on with a fine save from a point-blank Gareth McCauley header two minutes from time.
Millwall: Forde, Smith, Barron, Abdou, Ward, Craig (Hackett, 46mins), Schofield, Dunne, Morison, Harris (T.Robinson, 71mins), Henry. Subs not used: Mildenhall, Grabban, O'Connor, Marquis, Gallagher.
Scorers: Schofield (45mins), Morison (76mins)
Ipswich Town: Fulop, Peters, McAuley, Delaney, Edwards, Norris, Wickham, Priskin, Healy, Kennedy (Scotland, 77mins), O'Dea. Subs not used: Lee-Barrett, Hyam, Smith, Eastman, Fallon, Civelli.
Bookings: Priskin (38mins), Delaney (45+mins)
Scorer: Priskin (25mins)
Ref: I. Williamson
Att: 12,111 (away 928)