Jason Crowe filled in at full-back so manager Grayson must decide whether to make changes.
Gradel is expected to return to the substitutes' bench. Andrew Hughes was forced off in the closing stages of Sunday's cup clash with hamstring trouble, but is expected to be fit and otherwise, Grayson has a fully-fit squad to choose from.
Robert Snodgrass will also be itching to be back after coming on as a late substitute as well.
Source: Team Talk