Defender Adam Dugdale required a brain scan after suffering concussion in last Saturday's draw with Shrewsbury and will definitely miss out but Mathias Pogba (knee) and Ryan Colclough (stomach) are nearing full fitness.
Davis will also have to make do without long-term absentees Neil Etheridge (thigh) and Steve Phillips (shoulder) while striker Max Clayton (ankle) and defender Ollie Turton (knee) are not expected to feature.
The Railwaymen will arrive in Essex looking for their first win on the road since mid-October but will be encouraged by last season's trip to Colchester when strikes from Luke Murphy and Pogba secured a 2-1 win.
- Sports & Recreation
- Mathias Pogba
- Ryan Colclough
- Neil Etheridge