Crewe are waiting to discover the extent of the head injury Danny Blanchett suffered during the home victory over Aldershot.
The defender was forced off after 70 minutes of the 3-1 win on Saturday following a clash with a Shots player.
Blanchett's blow to the head resulted in concussion and a cut near an eye that required stitches.
He is a major doubt ahead of the derby clash at Port Vale this weekend.
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