Skrtel hasn't been able to train with his club Liverpool because of the problem. Forwards Stanislav Sestak and Robert Vittek are also out of the match next Wednesday in Klagenfurt. Sestak has a calf problem and Vittek a foot injury.
Slovakia coach Vladimir Weiss called up midfielders Karim Guede of Slovan Bratislava and Roman Prochazka of Spartak Trnava on Wednesday as cover. Both have yet to play an international.