Sussex seamer Amjad Khan is expected to be ruled out for six weeks with a wrist injury.
The 32-year-old has a fractured bone which will stall his efforts to return to first-team action after a lengthy spell on the sidelines.
The former England Test international has been plagued with a knee problem which has prevented him from making any county appearances this term, made to settle for three games for the second eleven.
The new injury will ensure he is unable to feature for Ed Joyce’s side until August, by which time he will hope to have made a full recovery.