United were the brighter of the two sides for the first 20 minutes or so and were duly rewarded.
Winger O’Hare’s dribble into the left hand side of the box distracted enough Norwich defenders to give Riedewald the time and space to shoot with a heavy first touch forcing the Dutchman to hit the ball on the volley which flew past keeper Vladan Kovacevic.
It was the jolt the hosts needed though as, after the opener, it was the Canaries who took the reins whilst United remained penned in.
Harry Darling and Mathias Kvistgaarden both went close from corners for the hosts before the break, with the Blades’ Adam Davies repeatedly called into action at set-piece situations.
The Wales international could not stop Norwich’s 11th corner of the match however as right back Jack Stacey – who was also a menace from the right-hand side – powered in the equaliser at 68 minutes from Wright’s wicked corner delivery.
Wright arrived onto the pitch on the hour mark but Paris Maghoma came on at the start of the second period and was the second of Philippe Clement’s substitutes who proved decisive on the night.
The midfielder streaked up the left hand side of the pitch, with Sheffield United overcommitting numbers in the last six minutes, and slid the ball across perfectly for Forson to fire in a curling left-footed strike to seal the comeback at a joyous Carrow Road.