City, who started with five Academy players, progressed to the fourth round of the Carabao Cup with goals from Jeremy Doku and Nunes.
The Portuguese midfielder is pushing for more minutes on the pitch with his start against the Hornets his first of the season.
While he got his first goal, Nunes was unlucky not to add to his tally with Watford goalkeeper Jonathan Bond making a string of fine saves.
CITY 2-1 WATFORD | MATCH REPORT
Guardiola was happy with his performance and says it has not been easy for him to adapt into the team.
“He has special qualities few players have, he’s unique,” the City boss said.
“In the space, transitions, he is unbelievable. I’m really pleased for him and the goal.
“He will score more. Still he has things to read and understand, it’s not easy sometimes in players to adapt.
“I’m really pleased for him, because he’s a lovely guy and lovely guys always deserves good things.”
Watch the full postmatch press conference in the video above...
