Kike, Adomah & Stuani score with headers
Leaders Boro three points clear
Brighton's unbeaten league start ended
Brighton 0-1 Middlesbrough
Middlesbrough midfielder Grant Leadbitter makes an absolutely terrible attempt to win the ball in the air with Uwe Huenemeier and gets more of the player than the ball.
In the book he goes...
An idea for you how tough it could be for Brighton to get back into this one....
Image source, Rex FeaturesOnly Preston's Jordan Pickford can match Middlesbrough's Dimi Konstantopoulos for Championship clean sheets this season.
Boro have only conceded 12 goals in 21 league games so far this term.
Middlesbrough well and truly bossing possession once more after that early goal.
Home fans a bit restless as their side see very little of it.
Half chance for Brighton as James Wilson tries an audacious volley from Inigo Calderon's cross.
But it's blocked 12 yards out by Middlesbrough's George Friend.
Image source, Rex FeaturesQuote MessageThat goal was coming for the visitors. They've had all the ball so far in the game.
Warren Aspinall, Former Brighton striker on BBC Sussex
Big test now for Brighton and their unbeaten record.
What response do Chris Hughton's men have?
Brighton 0-1 Middlesbrough
Jason Roberts
Ex-West Brom striker on BBC Radio 5 live
Quote MessageKike scores the goal but this is all about Albert Adomah. It's far too easy for him to do two or three stepovers and get the ball into the box. A brilliant goal for Middlesbrough.
Brighton 0-1 Middlesbrough
Image source, Rex FeaturesEarly goal goes the visitors way and a header from Middlesbrough's frontman Kike.
Superb cross from Albert Adomah on the left and it's a first goal in 16 appearances for the striker.
David Stockdale had no chance of reaching that.
Jason Roberts
Ex-West Brom striker on BBC Radio 5 live
Quote MessageMiddlesbrough are happy to have the ball and find those little pockets of space. Brighton are happy to drop in and allow Middlesbrough to have the ball when they're in good possession.
Early possession for Middlesbrough as Albert Adomah and George Friend find space down the left before cutting inside.
Low ball into the area but David Stockdale dives on it.
Brighton 0-0 Middlesbrough
And we're off and running at the Amex.....
Image source, Rex FeaturesBrighton are the only club in the top four divisions of English football not to have lost a league game this season.
Brighton v Middlesbrough (12:30 GMT)
Both teams on their way out on to the pitch knowing a win will guarantee them as Christmas number one...
Brighton v Middlesbrough (12:30 GMT)
Jason Roberts
Ex-West Brom striker on BBC Radio 5 live
Quote MessageChris Hughton has got an experienced Brighton side that are working hard. They have a winning mentality. Middlesbrough are strong defensively and their defensive capabilities are their real positive.
Brighton v Middlesbrough (12:30 GMT)
Image source, PAConfirmation of those earlier reports that Jose Mourinho is at the game.
Wonder if he's off for a walk down the pier later and a stick of rock?
Brighton v Middlesbrough (12:30 GMT)
Not long to go until kick-off, just time for a sneak peek inside the visitors' dressing room....
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Brighton v Middlesbrough (12:30 GMT)
Image source, Rex FeaturesAitor Karanka has a good record at the Amex Stadium - his Middlesbrough side has won both games they've played in Brighton since he took charge of Boro in 2013.
"I have good memories," head coach Karanka told BBC Tees. "In the first season we beat them 2-0, and last season we beat them 2-1.
"Now they are doing really well, their coach is really good, so it's going to be a tough game for us."
Brighton v Middlesbrough (12:30 GMT)
Image source, Rex FeaturesBrighton manager Chris Hughton is well aware of the dangers posed by Championship leaders Middlesbrough.
"The league table doesn’t lie," Hughton told BBC Sussex. "The top group of teams are very good and very competitive.
"Middlesbrough got to the play-offs last season. It seems the next game is always our biggest test of the season and this is no different. This will be our toughest test.
"We have a tremendous support here and a motivated crowd. We will need all of that."
Brighton v Middlesbrough (12:30 GMT)
Here's how the top six stands ahead of a full programme of fixtures this afternoon and tomorrow....
Image source, .#bbcfootball
Share your views with us on who you think will come out on top in this Championship clash.
Will Brighton's unbeaten record finally fall today? Will either of these still be in the top two come May?
Tweet using #bbcfootball
Image source, PA