Summer signing Ruben Dias has transformed the team’s mentality.
Ruben Dias who joined the Cityzens from Benfica last summer has become a crucial player on Pep Guardiola’s side.
Man City have lost only two games out of 41 in which Dias has featured.
He has formed a rigid partnership with John Stones at the heart of defence.
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“Bringing Dias into the team has changed everything,” said Dunne who skippered City for several seasons.
“The leadership and the confidence that he spreads has changed the outlook – he to me is the big difference.
“In terms of a mentality, we now believe we won’t concede, there’s very few individual errors.
“Dias gets people organised and in a defensive shape, certainly for the big games you need someone like that who can control the backline.
“What he’s done this season has been outstanding. We talk about the glory and beautiful football but what he’s given us as a defender has been outstanding.”