Yannick Bolasie has been ruled out for the year ahead of undergoing a knee operation in March.
The 27-year-old has played 14 games in the Premier League for Everton this season but has been booked off until December 31 2017 for what will be a second procedure on his damaged knee.
He suffered the most recent blow in the 1-1 draw against Manchester United in December.
Toffees boss Ronald Koeman told reporters: "Yannick has his second surgery in early March.
"The surgery was expected because his first surgery was about his meniscus, now what will happen at the beginning of March is about his cruciate.
"It is difficult to put a timescale because normally a cruciate can be six, seven, eight months.
"We had to repair the meniscus and then wait until his knee was ready to have the second operation.
"He was in several times during the week. He was OK, really positive, working hard to come back, but like every player in that situation you get difficult moments in a day, difficult moments in the week.
"He is positive about coming back as strong as possible."