The Sky Blues face a stern test in the shape of French Ligue Two outfit Valenciennes, looking to build on their opening win against Sutton United...
Lee Burge starts in goal, with Grimmer partnered in defence by Jordan Willis, Rod McDonald and Darragh Leahy.
Ben Stevenson comes into midfielder alongside Michael Doyle, with Peter Vincenti, Marc McNulty and Jodi Jones behind lone frontman Stuart Beavon.
Defenders Chris Stokes and Dion Kelly-Evans miss out after picking up slight knocks in training.
Coventry City XI: Burge (GK), Grimmer, Willis, McDonald, Leahy, Stevenson, Doyle, Jones, McNulty, Vincenti, Beavon.
Coventry City Subs: O'Brien (GK), Dev. Kelly-Evans, Hyam, Camwell, Kelly, Shipley, Trialist, Finn, Biamou, Ponticelli.