Coventry have been dealt a blow with the news that summer signing John Fleck has been ruled out for three weeks.
Fleck crossed for Cody McDonald to head the Sky Blues into the lead in the 1-1 draw against Yeovil on Saturday but left the field in the 34th minute with a hamstring strain.
The midfielder had sat out Coventry's Capital One Cup victory at Dagenham with the same complaint.
Manager Andy Thorn told the Coventry Telegraph: "It's a shame because I think he proved what he can offer us this season.
"It wasn't a case of taking a risk because he had fully recovered from the first one.
"But I suppose sometimes lightning does strike twice in the same place."