Crystal Palace midfielder Adlene Guedioura could be out of action for six to eight weeks after being stretchered off injured against West Brom last weekend.
The Algerian collided with Baggies goalkeeper Boaz Myhill during the first half of Saturday's 2-0 defeat at The Hawthorns and was replaced by Jason Puncheon after just 22 minutes.
And club physiotherapist, Alex Manos, has today confirmed that Guedioura sustained two fractured ribs and a partly collapsed lung as a result of the challenge, which will rule the 27-year-old out for at least six weeks.
The injury also means Guedioura will play no part in the second leg of his country's all-important World Cup Qualifying Play-Off against Burkina Faso on Tuesday 19th November. Algeria trail 3-2 from the away leg.
Manos told cpfc.co.uk this afternoon: "The challenge itself was pretty innocuous, but it was knee against ribs and when that happens, there was only ever going to be one winner.
"Adlene is looking at upwards of six weeks out now. It will take four to six weeks for the injury to heal and then another couple to get back into full training."
The news means Guedioura will miss a key period of matches for Palace, as they prepare to face Hull City, Norwich City, West Ham United and Cardiff City before 7th December.