Zurawski limped off of last night's International between England and Poland at Old Trafford, a match which England won 2-1.
'Magic' has scored five goals in his last five starts for Celtic, and it is disappointing he won't be available for Saturday's crucial match at Celtic Park.
Hoops boss Gordon Strachan said today, "He is going to see a specialist today and we'll have a better indication as to how long he'll be out then. He'll not play on Saturday."
One wonders who will now start up-front against Hearts. John Hartson was left out of Celtic's last match against Livingston, a game where both Craig Beattie and Shaun Maloney played well. A possibility is Craig Beattie partnering John Hartson, with Shaun Maloney dropping back into midfield.