Wolves midfielder Jamie O'Hara is facing "at least a month" on the sidelines after undergoing surgery on a double hernia, the club have confirmed.
Manager Mick McCarthy had initially ruled O'Hara out for a week, meaning the former Tottenham player missed Tuesday night's draw with Norwich and was set to sit out the Boxing Day game at Arsenal.
But the decision was then taken for the 25-year-old to undergo surgery, which was carried out in Manchester on Tuesday.
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