Sheffield United boss Kevin Blackwell again has defensive problems to content with ahead of Saturday's clash with Derby at Bramall Lane.

The loss of Chris Morgan to a torn rib muscle is the latest in a long list of injury setbacks to hinder Blackwell's promotion plans this season.

Possible replacements Marcel Seip and Andrew Taylor are both sidelined with hamstring problems, while Gary Naysmith remains absent due to his long-term knee injury.

But Blackwell can recall Toni Kallio to his side following his return to Bramall Lane on loan from Fulham. The Finland international was not eligible for the Watford game due to delays in his paperwork.

Recent signing Nyron Nosworthy is expected to continue at the heart of defence after making his debut at Vicarage Road, with Jonathan Fortune likely to partner him.