They began brightly and got their reward when Campbell rose highest to head home Isaac Mbenza's wicked inswinging cross from inside the area aftea six minutes.

Reading struggled to get near their hosts, who were buoyed by the early strike and looked confident in possession.

That self-belief was evident as Campbell attempted an audacious second only to see his attempt go well over the bar.

Reading were reduced to half-chances, with Sone Aluko drilling an effort straight at Ryan Schofield from outside the area.

But he then missed a gilt-edged chance for the visitors.

A collision between two players on the edge of the area saw the ball break for Aluko, who shifted it on to his right foot only to skew his effort wide of the goal, with Schofield frozen to the spot.

Town had to soak up a lot of pressure as the half wore on, but Pipa saw an effort deflected just over in between plenty of Reading possession.

In the final action of the half Schofield pulled off a fine point-blank save to keep out Tom Holmes' header.

The Royals picked up where they left off after the restart, with John Swift's free-kick just clearing the bar.

Lewis O'Brien then dashed down the other end and perhaps regretted not shooting as his unselfish centre just evaded the boot of Mbenza.

And that missed chance came back to haunt Huddersfield as Joao equalised in the 53rd minute.

The Portuguese latched on to a long ball over the top and he calmly guided his finish beyond Schofield.

And he completed the turnaround after 65 minutes when he lashed home a superb effort from outside the area for his 16th goal of the season.

Town fought valiantly in a bid to draw back level, but Mbenza could only poke an effort narrowly wide with their best chance as Reading held on.