Match ends, Huddersfield Town 0, Sheffield Wednesday 2.
Goals from Jeremy Helan and Jacques Maghoma helped Sheffield Wednesday win at Huddersfield and extend their unbeaten away run to nine games.
Helan - booked twice in this fixture without being dismissed last season - fired his side ahead before the break.
Maghoma added a second on 72 minutes following good work from Sam Hutchinson on his full debut for Wednesday.
Adam Clayton's late shot against the bar was the best chance for the hosts, who are a place above the Owls in 14th.
The win was a confidence booster for Stuart Gray's side before Monday's rescheduled FA Cup fifth-round tie with Charlton, with a quarter-final derby clash with Sheffield United the prize for victory.
Wednesday went ahead when Frenchman Helan took advantage of a ricochet in the box to drill a low shot into the bottom left corner on 40 minutes.
The 21-year-old's pace caused problems on the break throughout the game, notably twice early in the second half when he hit the side netting and had a shot blocked after sprinting clear.
Huddersfield were seeking a third win in four matches but lacked punch up front despite dominating possession.
And they fell further behind when Hutchinson - a transfer window loan signing from Chelsea - set up Maghoma for a close-range finish.
Clayton, who had scored twice in his last three outings, hit the woodwork for the Terriers in the last minute with a 25-yard effort and Danny Ward headed over a Paul Dixon cross in stoppage time, but the Owls held on to close to within four points of their Yorkshire rivals.
Sheffield Wednesday boss Stuart Gray:
"I was disappointed in the first half but after we changed it we started to dominate and by the end I was disappointed we didn't get more than the two goals.
"We have players who are willing to put their bodies on the line.
"A good defender has a good habit of getting hit by the ball and fortunately we have good defenders. We showed good legs and great team spirit."
Huddersfield manager Mark Robins:
"I could go ranting and raving and while that might make me feel better it won't do any good.
"You can count on the fingers of one hand the number of poor performances we have had this season. Our play in the final third was non-existent at times.
"Possession is vanity if you don't do anything with it.
"The crowd see you doubting yourself and the fans get on your back. The supporters need to stay with us because we have some young lads in the team."
- 12HammillSubstituted forLolleyat 45'minutes
- 39GerrardBooked at 78mins
- 27SmithBooked at 54mins
- 21WellsSubstituted forPatersonat 71'minutes
- 4NorwoodSubstituted forScannellat 58'minutes
- 22PalmerBooked at 28mins
- 41HutchinsonBooked at 50mins
- 8OnyewuSubstituted forLoovensat 69'minutes
- 40GardnerBooked at 65mins
- 34NuhiuSubstituted forBestat 66'minutes
- 7AntonioSubstituted forMaguireat 45'minutes
- Neil Swarbrick
- Shots on Target
Second Half ends, Huddersfield Town 0, Sheffield Wednesday 2.
Attempt missed. Martin Paterson (Huddersfield Town) left footed shot from outside the box is close, but misses to the right. Assisted by Jonathan Hogg.
Attempt blocked. Jonathan Hogg (Huddersfield Town) right footed shot from outside the box is blocked.
Joe Lolley (Huddersfield Town) wins a free kick on the right wing.
Foul by Joe Mattock (Sheffield Wednesday).
Offside, Sheffield Wednesday. Leon Best tries a through ball, but Jacques Maghoma is caught offside.
Attempt missed. Daniel Ward (Huddersfield Town) header from the centre of the box is just a bit too high. Assisted by Paul Dixon with a cross.
Adam Clayton (Huddersfield Town) hits the bar with a left footed shot from outside the box. Assisted by Tom Smith.
Peter Clarke (Huddersfield Town) wins a free kick in the defensive half.
Foul by Jacques Maghoma (Sheffield Wednesday).
Attempt missed. Joe Lolley (Huddersfield Town) left footed shot from the centre of the box misses to the left. Assisted by Daniel Ward with a headed pass.
Foul by Martin Paterson (Huddersfield Town).
Sam Hutchinson (Sheffield Wednesday) wins a free kick on the right wing.
Corner, Sheffield Wednesday. Conceded by Adam Clayton.
Attempt blocked. Leon Best (Sheffield Wednesday) right footed shot from a difficult angle on the right is blocked. Assisted by Jacques Maghoma.
Attempt saved. Martin Paterson (Huddersfield Town) right footed shot from outside the box is saved in the top centre of the goal. Assisted by Adam Clayton.
Anthony Gerrard (Huddersfield Town) is shown the yellow card for a bad foul.
Foul by Anthony Gerrard (Huddersfield Town).
Jeremy Helan (Sheffield Wednesday) wins a free kick in the attacking half.