Striker Romelu Lukaku has suffered an injury to ankle ligaments and will be assessed by the Club on Wednesday.
The 20-year-old Belgian was stretchered off during Everton's game at Liverpool after colliding with teammate Gareth Barry midway through the first half.
"We're going to assess it," said manager Roberto Martinez. "At the moment he's got his ankle in a cast and it doesn't look too good.
"He just collided with Gareth Barry at the corner as the ball was delivered into the box. It's there where he twisted his ankle."