Portsmouth midfielder Papa Boupa Diop will be out for up to three months with a knee injury.

Diop strained ligaments in his right knee against Arsenal in late December and the injury was confirmed by head physio Gary Sadler.

"We'll be taking him back to see the consultant in six weeks and then we'll know a little bit more about it then," he told the club's official website.

"He's in a brace and he's having treatment trying to get some of the swelling down on his knee."