The Spaniard celebrated his third anniversary at the helm with another excellent win over Pep Guardiola’s team.
Matty Cash scored the only goal of the game from a well-worked corner routine, with Villa then showing supreme commitment in the second half as they held on for the victory, becoming the first team in more than two months to stop Erling Haaland scoring.
Emery said: “Today the match in 90 minutes was a very good summary of the work we did in the last three years.
“There was confidence in our gameplan, the commitment to do our work and our task.
“Ollie Watkins didn’t score but played a fantastic game. Morgan Rogers played a fantastic game.
“Then we are scoring through a set piece with Matty Cash and we are winning and happy with the structure and our commitment.”