Sheffield United were angry that Poll failed to give a foul when Sol Campbel clashed with Wayne Allison - then inadvertently blocked a challenge in the build up to the first half winner.

BBC: Warnock rages at referee Poll

Alan Morgan is back from a ban, and Wayne Allison - cup-tied on Wednesday - is available again.

BBC: Tranmere looking for the double

Phil Jagielka's deep right-wing cross had Macho backtracking, forcing Stanislav Varga into a panicky, overhead clearance under pressure from Wayne Allison.

BBC: Sunderland slump to Blades