The 24-year-old was stretchered off midway through the 1-1 draw in Athens and will miss the remainder of the tournament's group stage. Kyrgiakos is also out of Greece's final UEFA EURO 2004™ qualifier against Northern Ireland.
It is the second serious injury setback for Panathinaikos in a week after striker Emmanuel Olisadebe was ruled out until January after knee surgery. Kyrgiakos is expected to be missing for a similar length of time.
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