Nigel Clough says the 'mistakes' of the match official in Thursday's play-off semi-final first-leg against Swindon Town still feel raw more than 24 hours on.
A number of potentially game changing decisions, backed up by television replays, went against the Blades in the 2-1 loss at Bramall Lane and despite his annoyance Clough now wants his players to right the wrongs themselves in Monday's second-leg at the County Ground.
The Gaffer remarked: "If the correct decisions had been made on the incidents we highlighted post-match on Thursday then we would have had a commanding lead going into the second-leg.
"We spoke to the referee and his assessors as we are allowed to 30 minutes after the final whistle and basically he made mistakes, we have seen all the incidents back, unfortunately in such crucial games these decisions really matter.
"It is just incredibly frustrating when games and possibly ties turn against you on such moments. If you play poorly or are beaten by a better side then you have to hold your hands up and be honest, but that wasn't the case the other night and it still hurts."
Looking ahead, Clough added: "We put everything into the first-leg leg, so we are going to try and take that sense of injustice and anger and bottle it up to use to our advantage in the return game."