Phil Jagielka could miss Everton's FA Cup semi-final after hobbling out of Saturday's 1-1 draw at Watford, according to manager Roberto Martinez.
The centre-back picked up a hamstring injury in the stalemate at Vicarage Road, and was replaced by Ramiro Funes Mori in the 90th minute.
"It was a real negative when Phil felt his hamstring towards the end," the Spaniard told the club's official website.
"He will be assessed over the next 24 hours but it doesn't look good.
"Phil doesn't get injured that often, so when he asks to come off then that is a worry. He was holding his left hamstring and we will assess it overnight.
"It is too early to tell [whether he will miss the semi-final]. We have a period of five games in two weeks, but he is a serious doubt for Wednesday and Crystal Palace."
