Everton boss Roberto Martinez admits Kevin Mirallas faces an injury scan after victory over QPR.
A poor challenge from Jordan Mutch towards the end of the game saw the Belgium international carried off on a stretcher.
"Kevin is a real negative today, he's got a real bad ankle," he said. "We're going to scan it in the morning and see the extent of the injury.
"It was a real disappointment to see him carried off at the end."