Chris Wilder has confirmed the Blades won't appeal the red card shown to striker Leon Clarke in Saturday's win over Barnsley.
Both Clarke and Tykes skipper Angus MacDonald were dismissed by referee Tim Robinson following a coming together just before half-time and the Blades boss gave his take on the incident having spoken with his striker.
Wilder remarked: "I spoke to Leon, they boy chucked a punch at Leon, who he has grappled with him and then their player has gone to headbutt him.
"I don't like to see players go down, but maybe for an experience player Leon should have walked away, but it is an initial reaction I suppose.
"Leon hasn't done too much really apart from grapple with MacDonald, so I would say he is really unlucky, but thankfully it didn't affect the game or the final outcome.
"I don't think there would be any mileage in appealing the decision."
Looking ahead to Tuesday's Carabao Cup clash against Leicester City, Wilder added: "We'll give an opportunity to a few and we've got a few knocks too, including Basham with a tight groin.
"We'll have to have a look at things, but we will pick a strong side and give it a real go."