Scunthorpe United could be without striker Ben May for several weeks with an ankle ligament injury.
The 24-year-old has scored two goals in 18 League One appearances this season, as well as notching in the FA Cup.
United manager Nigel Adkins told the club website: "He went for a scan on Thursday and it doesn't look good.
"He's damaged a ligament on the outside of his ankle. There's significant damage and, potentially, it could require surgery. It's a massive blow."