"We need positive energy and scoring early is how you feed the energy of the players," said Sanchez Flores.
"The players were really strong. They kept their shape and everything was really good. The fans were for a long time waiting, waiting, waiting. This was for the fans, they deserve it."
While Norwich appeared to regain control of the game in the first half, there was a certain inevitability about the outcome once they had fallen behind to Deulofeu's early goal.
"It [Norwich's start] was a disaster," said Canaries head coach Daniel Farke.
"They switched to five at the back and it was difficult to create chances against them so to invite them with such a nursery mistake was a confidence boost for them. It was a game-defining moment."