"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."