Fulham signing Manor Solomon is set to undergo knee surgery.
The 23-year-old made his Premier League debut against Liverpool last weekend.
"It's his knee... last Sunday in the session. Probably he will get surgery in the next few days," manager Marco Silva told reporters ahead of Saturday's trip to Wolverhampton Wanderers.
"Then we will have more news about it and be more sure of the timeline for him to come back.
"But it looks like he'll be a long time injured. Let's see, I think it's better we wait for the surgery, and after we will know more details about it."