Liverpool captain Steven Gerrard will undergo a scan on Thursday to assess the extent of a hamstring injury suffered in the FA Cup defeat by Everton.
Gerrard went off after only 16 minutes of Wednesday’s fourth-round replay, which Liverpool lost 1-0.
He now looks set to miss Saturday’s match against Portsmouth and England’s friendly against Spain next week.
“Steven was tired, and he gets injured. He asked to be taken off,” said Liverpool manager Rafael Benitez.
“He was tired, too, at Wigan but when I took him off there everyone was saying he had to play every single minute of every match. Now you have seen the consequences.
“You could see at Wigan he was struggling and the same thing happened here.”
And Benitez appeared to take a swipe at Capello if the England coach demands Gerrard take a further scan under the scrutiny of the England medical team.
“Maybe Gerrard will have to go to London to be scanned there too, just in case,” added the Spaniard.