British and Irish Lions captain Sam Warburton has been ruled out of action for four months after suffering from a hamstring tear, meaning he could potentially miss Wales' autumn Test campaign.
The Cardiff Blues man suffered the injury during the latter stages of the Lions second Test defeat to Australia, meaning he missed the series-clinching victory in Sydney.
The Blues had feared their openside flaker could be set for a lengthy lay-off, and following a recent scan, the club have stated he will not feature for the team until at least October.
"Sam suffered a grade three tear to his left hamstring in the second Lions test against Australia on the 29th of June," said Blues' medical chief John Miles.
"He has had a scan with specialists in London yesterday which has shown the injury is already healing. He therefore does not need surgery but will require a period of rehabilitation between 12 to 16 weeks from the date of the injury.
"His rehabilitation will focus on range of motion, flexibility and specific strengthening of the hamstring in order for him to return to full health."
The injury could prove to be a big loss to Wales as they may have to play their Autumn internationals against South Africa, Argentina, Tonga and Australia without Warburton, who is considered a key figure in the team.
A return in 12 weeks would give the 22-year-old a chance of featuring, although a four-month absence would surely rule him out of head coach Warren Gatland's plans.
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