Queens Park Rangers midfielder Jermaine Jenas has ruptured his anterior cruciate ligament and will now be out of action for up to nine months.
The 31-year-old, who was already struggling with a calf problem, suffered the serious knee injury in training on Saturday and is now likely to miss between six to nine months of action for the West London club.
QPR's head of medical services, Dr Peter Florida, told the club website: "He's been unlucky throughout his career with injuries, but he's in a positive frame of mind.
"JJ does everything asked of him in terms of injury prevention techniques – but unfortunately he's just one of these very unlucky players when it comes to injuries."
The former Newcastle United and Tottenham Hotspur man has made 28 appearances for QPR this season.