And that's it from me.
Sheffield United make it three wins on the bounce and move fifth in the Premier League.
It's tense late on. Brighton go long but Dean Henderson dives on the loose ball and will see out a few more seconds for the Blades.
The delivery is headed away but Adam Webster comes steaming on to Aaron Mooy's second attempt, only to nod well over the crossbar.
Corner for the hosts!
Aaron Connolly has been their best player since he came on and his effort is deflected over.
That's roused the home fans... Sheffield United now camped in their own half and content with just trying to see this one out.
FIVE minutes of injury time.
Sheffield United will go fifth if they can hold on here. Not a bad early Christmas prezzie for Chris Wilder...
Yep, decision stands. No penalty.
Yves Bissouma goes down in the box!
And is booked for diving... think VAR will have a gander, but that looked like a dive to me.
And they nearly score on the break!
A fast, flowing move from the Blades but David McGoldrick can only help it over the bar.
Headed away. Every yellow shirt inside their own box. Chris Wilder's side are determined to hang on here.
Aaron Connolly has looked lively since coming on and he wins a free-kick on the edge of the box.
Just over from Lys Mousset! Good stuff from the substitute, wriggling inside from the left flank before blasting narrowly over the crossbar. The Blades still looking a danger on the break.
Brighton corner... what can they do here? Sheffield United defend it well. But the visitors can't get it properly clear.
Brighton are pressing. But not really threatening so far.
Time to gung ho ho ho... ?
Come on, it's Christmas.
Yellow card for Enda Stevens after snapping at the heels of Davy Propper. Taking one for the team and all that.
Ooh! Tasty from Brighton substitute Aaron Connolly, working some space on the edge of the box and stinging the fingers of Dean Henderson with a fierce effort.
All getting a bit scrappy at the Amex. Sheffield United haven't really threatened since that second goal was ruled out by VAR. Then again, Brighton haven't really produced anything worthy of bringing them level...