Freddie Sears is extremely unlikely to be available for Coventry`s home clash against Preston while Aron Gunnarsson is also a doubt.
On-loan striker Sears limped out of training on Thursday having taken a whack to his ankle, leaving manager Chris Coleman light in attacking options with Jonathan Stead (cartilage operation) out for the season.
Freddy Eastwood (back) has trained okay this week and should start alongside Clinton Morrison while Sears` absence could see youngster Sean Jeffers play a role from the bench.
Midfielder Gunnarsson, meanwhile, dropped out of training late on in Thursday`s session with a thigh/hip problem and will be assessed over the next 24 hours.
Michael McIndoe now stands a strong chance of starting after his recent return from a hip/back complaint.
Centre-back James McPake (groin and knee) and midfielder Gary Deegan (ankle) are out for the remainder of the campaign.
Preston make the trip with a shortage of centre-backs which has resulted in 17-year-old Bailey Wright being drafted into Darren Ferguson`s matchday squad.
On-loan Elliott Ward is ineligible to play against his parent club while Youl Mawene is away on compassionate leave, leaving Sean St. Ledger and Liam Chilvers as the likely central defensive partnership with Wright competing for a place on the bench.
Fellow youngster Adam Barton will be assessed over the next 24 hours having been forced off on his debut in last weekend`s 3-2 win over Scunthorpe following a clash of heads. The injury is not as bad as first feared but he will play no part at the Ricoh Arena.
Ross Wallace is available after a two-match ban while Chris Sedgwick and Darren Carter also both return following knee problems and will be looking to step into midfield.
Long-term absentee Barry Nicholson (broken leg) will see a surgeon on Tuesday and is hoping to get the all clear to return to full contact training next week but Paul Parry remains sidelined.
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