Sri Lanka fast bowler Lasith Malinga faces a lengthy period on the sidelines after scans showed a "stress reaction" in his left knee.
Malinga missed the World Twenty20 in India due to the problem, which he picked up in the West Indies last November, and has been unable to feature for Mumbai Indians in the Indian Premier League this year.
The 32-year-old's continued absence could also see him ruled out of Sri Lanka's tour to England in the coming months, Graham Ford's side due to arrive in early June.
"Malinga is suffering from a stress reaction in the knee," Sri Lanka Cricket medical committee chairman Doctor Harindu Wijesinghe is quoted as saying by ESPNcricinfo.
"This has been caused by pressure being put on the knee. There is a chance that a stress reaction could worsen to a stress fracture, at which point he would need surgery.
"A few doctors have been advising Malinga, and we feel that he needs to rest his knee, while undergoing physiotherapy and strengthening.
"Only after seeing how he the injury reacts to this, will we be able to say how long he might be unavailable. It might be a number of months before we decide to scan and test him again. It's difficult to put a time frame on his recovery."