Anthony Knockaert created three excellent first-half chances for Forest
Ryan Tunnicliffe's second-half strike secured back-to-back Championship wins for Luton Town as Nottingham Forest were made to pay for some sloppy finishing.
Tunnicliffe cleverly controlled Pelly Ruddock Mpanzu's enticing cross to steer the ball past Reds goalkeeper Brice Samba as the Hatters won at the City Ground for the first time in 13 league visits.
In-form Forest, who had only lost two of their previous 15 fixtures, faded after the interval but were on top until Tunnicliffe's winner.
Glenn Murray missed two excellent chances, teed up by the impressive Anthony Knockaert, while Joe Lolley also went close.
But the visitors resisted the pressure and saw out a win which takes them up to 13th place in the table, four points above Forest and nine points behind sixth-placed Cardiff City, who beat Derby County 4-0.
- Relive Tuesday night's EFL action
Luton's first victory away to Forest since a team managed by David Pleat overcame Brian Clough's side in March 1983 seemed unlikely during a one-sided first half.
Knockaert stood out, setting up Murray for a decent early chance with a right-wing cross and laying on an even clearer opportunity from the other flank with a fine cross which the veteran striker volleyed over the bar.
Luton, who came from two goals down to beat 3-2 Sheffield Wednesday last time out, made the most of Forest's wastefulness to win consecutive Championship games for the first time since their opening two fixtures of the season.
Tunnicliffe's carefully guided strike, an almost identical chance to the one Murray missed, put them ahead and they could have added to the lead when Elijah Adebayo found Jordan Clark in the area, but his low effort went just wide of the far post from a tight angle.
Forest's 14th defeat from 34 league games this season leaves Chris Hughton's side 11 points clear of the relegation zone, but having played three games more than third-from-bottom Rotherham United.
- Line-upsMatch StatsLive Text
- 30Samba2Christie3Figueiredo4Worrall5Ribeiro37Garner18Ribeiro Dias28KnockaertSubstituted forMightenat 79'minutes27KrovinovicSubstituted forTaylorat 68'minutes23LolleySubstituted forAmeobiat 68'minutes25Murray
- 6Mbe Soh8Colback11Ameobi12Smith15Freeman16Jenkinson17Mighten24Blackett33Taylor
- 12Sluga18Clark6Pearson24NaismithBooked at 61mins3Potts16Rea4Tunnicliffe22Dewsbury-Hall17Mpanzu29AdebayoSubstituted forCollinsat 80'minutes7CornickSubstituted forBreeat 85'minutes
Referee:Jeremy SimpsonMatch StatsHome TeamNottm ForestAway TeamLutonPossessionHome60%Away40%ShotsHome19Away9Shots on TargetHome4Away3CornersHome8Away1FoulsHome8Away8Live TextPost update
Match ends, Nottingham Forest 0, Luton Town 1.
Second Half ends, Nottingham Forest 0, Luton Town 1.
Foul by Yuri Ribeiro (Nottingham Forest).
James Collins (Luton Town) wins a free kick on the right wing.
Foul by Joe Worrall (Nottingham Forest).
Simon Sluga (Luton Town) wins a free kick in the defensive half.
Corner, Nottingham Forest. Conceded by Kal Naismith.
Attempt blocked. Sammy Ameobi (Nottingham Forest) left footed shot from outside the box is blocked. Assisted by Cyrus Christie.
Foul by Alex Mighten (Nottingham Forest).
Jordan Clark (Luton Town) wins a free kick in the defensive half.
Attempt blocked. Pelly-Ruddock Mpanzu (Luton Town) right footed shot from outside the box is blocked.
Substitution, Luton Town. James Bree replaces Harry Cornick.
Attempt missed. Cafú (Nottingham Forest) right footed shot from outside the box is high and wide to the right. Assisted by Yuri Ribeiro.
Attempt saved. Kiernan Dewsbury-Hall (Luton Town) left footed shot from outside the box is saved in the bottom right corner. Assisted by Ryan Tunnicliffe.
Foul by Glenn Murray (Nottingham Forest).
Kal Naismith (Luton Town) wins a free kick in the attacking half.
Substitution, Luton Town. James Collins replaces Elijah Adebayo.
Substitution, Nottingham Forest. Alex Mighten replaces Anthony Knockaert.
Yuri Ribeiro (Nottingham Forest) wins a free kick in the defensive half.
Foul by Elijah Adebayo (Luton Town).
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