Manchester City boss Pep Guardiola says Aston Villa deserved their win on Wednesday night.
Leon Bailey's deflected shot gave Villa a deserved three points against the defending champions.
Guardiola later said: "Aston Villa were better. They played a fantastic game, we struggled to make our process and be more aggressive in moments, but, yes, the better team won.
"We played with our desire but they played better. We struggled, especially in the first half and the second was completely different. In the final third the quality of the pass and the movement, we didn't find it all game.
"They are physical, they made a good block with the pressing. The fact we didn't win the last few games, that's the quality of the Premier League and the teams are exceptional.
"The challenge is to go to Luton and win the game. We know what's our level and as a manager we have to find a way to win games. We're struggling a bit. I'm here to help them."