Harlequins fly-half Demetri Catrakilis will miss time after suffering a “small fracture” to a bone in his throat in the win over Gloucester on Sunday.
Catrakilis stopped breathing for several seconds and was taken to hospital after suffering the injury 12 minutes into the game.
Harlequins have not said how long the 28-year-old will be out for, but the injury will not require surgery.
Catrakilis was making his first start since joining Quins in the summer.
Harlequins issued the following brief statement on Monday: “Harlequins fly-half Demetri Catrakilis remains in hospital after sustaining a small fracture to a bone in his throat during the match against Gloucester Rugby on Saturday.
The fracture does not require surgery and Harlequins will provide a further update when available.”
Surgery for Sam Warburton
Wales and Cardiff Blues flanker Sam Warburton is to have surgery on a long-standing neck injury, ruling him out for up to four months.
The 28-year-old, who captained the British and Irish Lions in their drawn Test series with New Zealand this summer, aggravated the injury in training this week.
The operation means Warburton will miss all four of Wales’ autumn Tests.
He will also miss key Pro14 and Challenge Cup dates for the Blues.
“It is a major blow for all concerned, for Cardiff Blues, Wales and Sam Warburton,” said Blues head coach Danny Wilson.
“It is a long standing issue Sam has had. He gets pain and discomfort on and off.
“The feeling was that the two months off [after the Lions tour] to allow that to completely settle without any rugby would do him the world of good, which to be fair it did.
“He is frustrated because he would have thought after two months he would have been quite fresh. But it is the right thing to do.
“For him personally it’s another frustration in terms of an injury he has to come back from.”
Warburton missed six weeks at the end of last season with a knee injury, while in October 2016 he suffered a fractured cheekbone that put him out for three weeks.
He has also had several serious shoulder injuries during his career and also missed the deciding Lions Test against Australia in 2013 with a torn hamstring.
The Blues already have injury problems in the back row, with Ellis Jenkins (hamstring) and James Botham (ankle) also ruled out for up to four months.
That leaves Josh Navidi as the only senior specialist open-side flanker.