Aston Villa boss Dean Smith, speaking to BBC Sport: "We were unrecognisable from what I've seen in pre-season in the first half and what I had seen last season. We lacked intensity and got done on the counter. We were better in the second half but always going to leave ourselves a little open.
"We've got new players who can play in a number of different positions. We were missing Ollie Watkins through injury. Whether Jack [Grealish] is in or not we can perform certainly a lot better than that. We had spells in the second half.
"There is always a bounce when you are newly promoted and their fans got behind them but I don't put the loss down to that."
Watford boss Xisco Munoz, speaking to BBC Sport: "Today was an amazing day. Perfect because we meet with our fans, they give a good support and I am very happy because a very important three points.
"An amazing performance, the team was very hungry. We need to keep going. The team was hungry and this is important. I am very happy for the guys because they worked very hard and they are happy because they won this important three points.
"We know what is the Premier League, we know about Aston Villa and we know we can have a little mistake and if you have a mistake then they have very good players."