The result increased the pressure on Hughton with his side remaining in the bottom three.
He said: "At this moment, it is very tough to sit here on the back of that defeat.
"Apart from two goals - Toure scored a wonderful free-kick and one of them was offside - all the goals were too easy for Manchester City to score.
"It started early; we conceded early goals which put us on the back foot and made us nervous. You can't afford to do that.
"It shows the absolute quality they have got, we found it very difficult to handle them and we suffered our biggest defeat."
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