Toure on Tuesday night played for City when they twice led at home to Aston Villa in the Capital One Cup before conceding a total of four goals when succumbing to a 4-2 defeat. The Premier League champions are yet to keep a clean sheet this season and in eight fixtures have conceded 16 times in an ultimately relatively uninspiring start.
“It was a disappointing night,” said Toure, the club’s former captain who arrived from Arsenal for £16m in 2009. “The team didn’t play well. We conceded four goals, which is not good, and we gave some cheap goals to Villa as well.
“It concerns us because a team like Man City cannot expect to concede four goals at home.
“Since the season started we have not had a clean sheet and that is very important when you want to be a top club, you have to defend better as a team.
“As a defender and as a group we have to work on it because mistakes were done by a few players and when you win it is everybody so when you lose it is everybody.”