Randolph sustained a blow to the nose and a gashed finger during Saturday's 3-2 defeat at Leicester and is likely to be rested, with back-up Colin Doyle having started the first-round victory over Plymouth. Youngster Nick Townsend is set to take his place on the bench.
Winger Shane Ferguson (groin) will definitely play no part having been forced off at the weekend, neither will Mitch Hancox (ankle), Akwasi Asante (hamstring) or Nikola Zigic (back).
Blues will be hoping for a repeat of their 1-0 Championship success at Huish Park earlier this month.
- Sports & Recreation
- Nick Townsend
- Mitch Hancox
- Akwasi Asante
- Nikola Zigic