Nuno started the 3-1 win with Mateus Fernandes and Freddie Potts in midfield on the day.
He remarked aftewards, "I think Freddie and Mateus did a good game.
"The idea was to try and control the middle against Newcastle because they have Bruno, they have Joelinton, they have some quality players.
"If you allow them to play free, they're going to put you against the road, so realising that you had to work very hard was good and the young guys did it.
"It was important to see that we were suffering but not conceding."
Nuno also said, "The confidence boost is huge.
"I think to win the way we did it, I think for us it's to realise how important it is that we have to be organised, how important it is to work off the ball and how important it is to be compact, to be together, to not allow teams to play freely.
"Because after we have the ball we can consider and go forward, but as long as we are basically compact and solid in the way we want to approach the competition, in the Premier League especially, we cannot afford to not work harder, to sacrifice ourselves."