Abdoulaye Doucoure has joined Everton's growing injury list after the midfielder picked up a knock against Aston Villa.
The 29-year-old was replaced just after the half hour mark - and moments after Danny Ings had opened the scoring for the home side.
It was another blow for Frank Lampard, who has already lost Dominic Calvert-Lewin, Yerry Mina and Ben Godfrey to long-term injuries this month.