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Richard Dunne believes the dropping of Claudio Bravo sparked a major improvement in Manchester City's defence.
After conceding six goals from six shots against Everton and Tottenham in January, the much-maligned Chilean goalkeeper was replaced between the sticks by Willy Caballero.
Since Caballero came into the side at the start of the month, City have conceded just once in the Premier League and claimed three successive wins.