Midfielder Jordan Shipley and striker Duckens Nazon are fighting for their Coventry places to face Cheltenham.
The pair were hauled off at half-time of the 2-0 defeat at Morecambe last weekend and were replaced by Devon Kelly-Evans and Peter Vincenti.
The Sky Blues will again be without midfielder Liam Kelly, who is out for up to eight weeks with a heel problem.
Tony Andreu and Jodi Jones are out for the season with serious knee injuries.
Cheltenham have a doubt over defender Taylor Moor.