Everton manager Roberto Martinez has bemoaned the training-ground injury that could see defender Leighton Baines sidelined for a month.
The England international was a late withdrawal from the Toffees squad that drew 2-2 with Watford on Saturday after suffering an ankle injury in training. While the extent of the injury is not yet known, Martinez fears that Baines, who underwent ankle surgery at the end of last season, could be sidelined for some time.
"We don't know how long he will be out for but it has been a real disaster," told Everton TV.
"We were preparing for the Watford game and in training, he blocks the ball and it hits him in exactly the same place where he had surgery, with the unfortunate result that he's going to be out for a while."
He added: "I don't think I had seen him looking as powerful and refreshed in the last two seasons. Then there was this big knock.
"We still have to find out how long it will be, but it is not going to be just two or three weeks – I think it is going to be a little bit longer than that."