Sorensen admitted that he had been suffering from a back injury prior to the game at Villa Park on Sunday and was in too much discomfort to play the final forty-five minutes of the 1-1 draw.
He is however, hopeful of being fit for Denmarks international game this weekend.
"It is hard to tell how bad it is, but I have a good feeling that I will get the okay before Saturday," Sorensen told Sky Sports. "I expect to know for certain by Wednesday or Thursday. The physio says that it is not something serious and that is positive. "It is something muscular. There should be no doubts that I will do everything to get fit and I have got a week to get it now."