Everton boss David Moyes revealed he had yet to discover the extent of injuries suffered by Phil Jagielka, Jack Rodwell and Leon Osman in the loss to Bolton.
Jagielka limped out of the action in the first half after landing awkwardly as he tackled David Ngog.
He was replaced by Jack Rodwell but the England midfielder was also replaced midway through the second period.
Osman had also trotted towards the treatment room just after the restart, but Moyes had yet to assess the damage to his three players.
“We’ve got one or two knocks but I haven’t had a chance to find out how they are yet,” he said. "We will assess them over the next few days."
The Blues were already without injured trio Marouane Fellaini (abductor), Seamus Coleman (thigh) and Royston Drenthe (illness) before the clash with the Trotters.