Crewe's on-loan Manchester City forward Harry Bunn is set for a lengthy lay-off as he has suffered knee ligament damage.
The 19-year-old, who spent time with Rochdale, Preston and Oldham last season, joined Alex until January last month and was enjoying a second start when he suffered an awkward fall in the second half of Saturday's 0-0 draw against Tranmere.
Bunn left the field on a stretcher and may miss the rest of the campaign after learning surgery is needed to repair his cruciate and lateral ligaments.
Crewe manager Steve Davis said: "He's been with the consultant over in Manchester and has found out that he's got some extensive ligament damage - his lateral ligament and his cruciate ligament.
"So he's going to need a couple of operations to put that right and obviously an extensive rehabilitation period depending on how well that goes. It could be the season to be honest.
"We're just disappointed for him. He's a lovely lad, he came here to get some games and was enjoying his football."