The Black Cats took a first-half lead when Joe Gelhart received Amad’s pass before converting with a low effort past goalkeeper Tomas Vacilk.
Sunderland had chances to double their lead before the break but were pegged back just before the hour mark, with Josh Koroma’s deflected effort beating Anthony Patterson.
Here’s how Phil Smith rated the Sunderland players against Huddersfield:
1. Anthony Patterson - 8
Deserved a clean sheet, commanded his box outstandingly well and totally nullified Huddersfield’s threat from crosses and set pieces. Left with absolutely no chance to save Koroma’s deflected effort. 8 Photo: Martin Swinney
2. Trai Hume - 7
Had a good game defensively and made some important interventions, while one or two promising forays forward could have yielded more. 7 Photo: Frank Reid
3. Luke O’Nien - 6
Tried to move the ball quickly and got through the bulk of his defensive work with little fuss. 6 Photo: Frank Reid
4. Danny Batth - 6
Went off late on which will be a concern to Sunderland ahead of the final three games. Had a solid outing in the main. 6 Photo: Frank Reid