Everton defender Phil Jagielka has reportedly left Goodison Park on crutches following his side's 2-1 defeat against Bolton Wanderers.
The England international was substituted after his challenge stopped David Ngog from giving Wanderers a half-time lead.
The 29-year-old was then replaced by Jack Rodwell.
Manager David Moyes has said that he will know the extent of the injury once Jagielka undergoes a scan.