Watford caretaker boss Hayden Mullin, speaking to BBC Radio 5 Live: "It was always going to be a tough ask, we knew that. They are a great side with a great manager. They were hurt after their result at the weekend - the Arsenal game - so we knew it would be tough.
"We set up a certain way and I thought we did well right up until the first goal. The second goal was a bit unfortunate. Will Hughes maybe gets a foot on it for the penalty, but those decisions don't really go for you when you are at the wrong end of the table.
"City do this to most teams. The minute you come out and give space they take advantage of it. It didn't work today for us so we look to go again."
Man City boss Pep Guardiola, speaking to BBC Radio 5 Live: "A different competition, reality and opponent. But we did it today. We were so focused on ourselves so we didn't speak much about Watford.
"We can win or we can lose, it is part of the game. In your career as a football player you can lose more games than you win. But always we must finish the game, go into the locker room and say 'yes, I did everything to win the game'. When this happens we can be proud of ourselves."
On Raheem Sterling: "He is quality. But the personal achievements are always related to how we have done in the Premier League. We finished far behind the champions so that is why Raheem must not be happy for the season we have done in the Premier League."