Defender Alan Hutton believes Roy Keane's personality has been key to Aston Villa's impressive start to the Barclays Premier League season.
Hutton reckons assistant manager Keane has added fire to the dressing room since his summer arrival.
Villa are second in the table and host Arsenal on Saturday after opening their campaign with four unbeaten games.
And right-back Hutton, who signed a three-year deal at the club this week, says Keane's famous passion is vital.
Asked by BBC1's Football Focus programme...