Arsenal are back on top of the Premier League.
After Manchester City's win at Crystal Palace earlier today, the Gunners have followed suit with a comprehensive victory here at the Amex.
A first half penalty from Bukayo Saka and second half goals from Kai Havertz and Leandro Trossard did the business from an attacking perspective while the defence clocked up another clean sheet on the road.
90+5. Ben White picks up a daft yellow in the final seconds for kicking the ball away, and with it brings the biggest cheer of the day from the home fans.
90+2. The Arsenal fans are singing in the rain.
Enjoy it, Gooners, because in a moment you're going to have to spend an hour queuing up to get into the train station.
90. Gabriel is celebrating as if he has already won the Premier League.
With the board showing five minutes, the ball drops to Joao Pedro at the back post.
The Brighton substitute winds up a goalbound strike, one that the Arsenal defender throws himself at to block and preserve the clean sheet.
88. Mikel Arteta makes his final two changes, bringing off Kai Havertz and Martin Odegaard off to hero receptions.
On for a late runaround are Eddie Nketiah and Fabio Vieira.
86. Three goals for Arsenal! Three points for Arsenal!
Pascal Gross is caught in possession by Kai Havertz midway inside the visitors' half, and the ball falls kindly into the path for Leandro Trossard.
With nothing and nobody ahead of him, the Belgian puts his head down and goes, running 50 yards to bear down on Bart Verbruggen before dinking a beautiful finish over the stranded goalkeeper.
Advantage Arsenal in the title race!
83. Brighton are pushing and pushing, committing more and more men forward, which usually means one thing.
Arsenal on the counter, anyone?
81. Into the final ten, and Brighton are starting to dominate the ball for the first time tonight.
However, Arsenal's are keeping them at bay - and seem very happy to do so.
79. Now William Saliba picks up a caution.
It seems a harsh decision on the centre-back, whose challenge on Joao Pedro was minimal. In fact, it might have been given for the defender's reaction to seeing a free-kick awarded.
77. The home side make their third change and it's the end of the road for former Arsenal man Danny Welbeck.
As the striker goes off, the Amex welcomes back Barcelona loanee Ansu Fati for his first Premier League appearance since March 10.
75. Carlos Baleba becomes the first player to see his name written into John Brooks' notebook.
The Brighton midfielder is penalised for cynically pulling down Gabriel Martinelli after David Raya's launch upfield had threatened a swift counter.
73. Arsenal's goal difference is now at +50, eight more than Liverpool and ten more than Manchester City.
How crucial that could be come the end of the season.
71. Another change for Arsenal.
Takehiro Tomiyasu comes on for the final stages, shoring up a defence vacated by Oleksandr ZInchenko.
69. Trossard nearly rubs salts in Brighton wounds by scoring against his former club.
The Belgian's driving run from midfield ends with a fierce low shot towards the bottom corner that Verbruggen does well to keep out.
67. Kai Havertz now has nine Premier League goals this campaign, his most in a season since he moved to England.
Perhaps we are beginning to see the player Chelsea thought they had bought.
It's incredible what coaching and tactics can do.
65. With his side's lead doubled, Mikel Arteta takes the opportunity to make switches of his own.
Gabriel Jesus and Bukayo Saka make way, and on come Gabriel Martinelli and Leandro Trossard, the latter to boos from his former supporters.
63. De Zerbi was desperate to make the changes before that second goal, and continues with them regardless.
Joao Pedro and Facundo Buonanotte are on in place of Julio Enciso and Jakub Moder.
62. It's two, and the Kai Havertz redemption story continues!
The goal, crucial for the Gunners, is shambolic from a Brighton perspective, and starts with Julio Enciso cheaply giving away possession.
Despite Bukayo Saka being down injured, the visitors push forward, taking advantage of Simon Adingra and Pervis Estupinan ball watching.
Jorginho remains onside as he's fed on the right, and his centre to the near post is converted from close range by Havertz, right in front of the ecstatic Arsenal support.
60. Indeed, it looks a double substitution is imminent for Brighton as the game swings from one end to the other.
58. Changes are being prepared on both benches, although it looks as though Roberto De Zerbi is going to be the first to act.
You get the feeling this is an extremely pivotal stage of the match and, potentially, the season.
56. It's all happening at a Brighton corner with Dunk and Rice almost wrestling the shirts off each other.
As a side note, Enciso lashes a volley high into the stands.
54. It's getting a little feisty out there now.
This time Enciso, Jorginho and Gabriel exchange words after the little Brighton man goes tumbling.
52. Former Brighton player Ben White has not warmed himself to the fans who used to cheer his name.
In a clash with Pervis Estupinan off the ball, the Ecuadorian shoves a soft hand into the face of his opponent.
It takes White a second or two to acknowledge the act before he drops theatrically to the floor, attempting to get Estupinan sent off.
Thankfully, neither John Brooks or VAR are interested in the incident.
Pathetic behaviour all round.