“We are conceding more goals than normal and have to try to find a solution,” Emery said.
“Of course we conceded one transition today and they scored. After we played against Liverpool, we made the same mistake again today.
“Overall we had more chances, dominated the match and wasn’t conceding a lot of them. We deeply analysed the transition against Liverpool, this time it was different but even allowing for that, they scored.
“Against Liverpool we had two around the box and today we had three around the box.
“But of course it is a balance in terms of how many players we can have in the box and how we react and respond when they are running at us.”
Sarr held off Ian Maatsen after Jean-Philippe Mateta put him through with a perfect through ball to pierce Villa’s high line in the fourth minute. The forward then buried his shot inside Emiliano Martinez’s near post.
The equaliser came in the 36th minute. Ollie Watkins waltzed around Dean Henderson and tapped into the unguarded net after John McGinn put him through with a perfectly weighted pass. Villa survived a VAR call for offside.