Everton are sweating on the fitness of James Rodriguez after Saturday's draw with Manchester United.
The Colombian scored to make it 2-2, but was withdrawn with 20 minutes remaining due to a calf complaint.
Speaking after the game, manager Carlo Ancelotti confirmed the injury.
"He had a problem on his calf at the end of the first-half," he said.
"We tried for 10-15 minutes [of the second-half] but the calf was tight.
"I prefer to take him off."