Arteta later said: "A really tough opponent to play and we had the game under control at 1-0 but we conceded and then had a beautiful challenge in the second half. We were so aggressive and got rewarded.
"Mistakes are part of football and it's how you react to that. I'm so happy for Aaron (Ramsdale) and I'm so happy that we won the game.
"You have to win every game with the level of Manchester City and Liverpool. There is no space for slip ups. We really had to respond to the challenge in the second half and show our maturity. We were emotionally really mature.
"The whole game the way the fans reacted and the way they push the team is amazing. It is a joy to be there and enjoy a football match with your supporters.
"The hardest thing in elite sport is to do it every three days. The willingness amongst the group is really special. I will have a relaxed Sunday."
He added: "The manner of the win, 100%. The spirit we showed. Tomorrow will be a great day to watch some fantastic games of football.
"It is not in my hands, it is a joy to be part of this league and a joy to be part of something special that we are trying to achieve."