Liverpool defender Dan Agger admits he shouldn't have played against Chelsea.
Agger admits he should have rested a groin problem against Chelsea at the weekend but played because of illness to Martin Skrtel.
"I should not have played on Sunday but Skrtel became ill and there was not much I could do. I was thrown into it," he told TV2 in Denmark.
"I have a pulled groin. It was something that should have kept me out on Sunday but it did not. I played the game.
"It takes hopefully only a few days (to recover).
"The reason why I have cancelled for Wednesday is that it is a bit early to play three days after I played 90 minutes with a groin problem."