Bernd Leno: If he makes it through this season without losing his cool with the defenders playing in front of him then Leno deserves the club's player of the season prize. His every good save, and there were a few today, is undone by another moment of ever greater ineptitude by those who are supposed to be protecting his goal. 8
Hector Bellerin: A slip on the half hour mark that released Brighton for a dangerous counter typified Bellerin's woes on the defensive end. Though he made telling attacking contributions in the second half he looked off the pace at the back, particularly struggling in the air. 4
Sokratis Papastathopoulos: He appears to be on a vertiginous decline. His defending for the corner from which Brighton scored was clumsy and unauthoratative.
Though there were moments when he successfully outfought Neal Maupay and Aaron Connelly he was also all too easily outpaced. 3
David Luiz: He began the game in familiar fashion with an error that nearly allowed Connelly to pounce. He continued in much the same vein.
At £8million he seemed to be a bargain short-term option to plug the holes in Arsenal's backline. With his carelessness in possession, inability to win balls in the air and lack of composure he has brought the Gunners nothing they did not have before. 4
Sead Kolasinac: A typical Kolasinac game where he appears to power along the left flank effectively but you struggle to remember him delivering a telling cross or making a decisive contribution at the back. 5
Granit Xhaka: Bar Leno Xhaka was the only player to emerge with his copy book unscathed in a first half that might have been Arsenal's worst of the season. His passing range was crucial as, whether by design or otherwise, the hosts' played a counter-attacking game designed to rip through the Seagulls at pace. 6
Lucas Torreira: He may have done little wrong but the Uruguayan was unable to provide the cover at the back Arsenal so desperately required. 5
Pierre-Emerick Aubameyang: The club captain certainly could not have been accused of not putting a shift in on the right flank. He was constantly tracking back to protect Bellerin but inevitably that neutered him as an attacking force. 5
Joe Willock: It started so well. Early on Willock was the trigger man for a new Arsenal, pressing high and playing with tempo. It didn't last.
Passes went astray, his touch was too heavy and he offered little in attack or defence. Moments before he was hauled off at half-time Aubameyang beat the turf and furiously reprimanded the youngster. It was a chastening end to a tough night. 4
Mesut Ozil: His set piece delivery was superlative again but parked wide on the left he was unable to exert any real control on the game. The same was no less true in a second period where Ozil and Arsenal failed to apply any degree of control to the game once they drew level. 5
Alexandre Lacazette: No player's decline more accurately mirrors Arsenal's over recent months. The reigning player of the season is unable to get involved in the game, his touch is heavy and his mood is foul.
For all that he was still able to provide such quality from Ozil's corner to bring Arsenal level. The question must be why those contributions are so infrequent. 5
Nicolas Pepe (sub, Willock, 46'): Not for the first time this season his impact off the bench was immediate. With Bellerin overlapping he darted infield to cause chaos in Brighton's back three.
Perhaps he had been spurred on by Freddie Ljungberg's uninspiring response to his exclusion from the Norwich game. "I was signed to make the difference and I've not done that," Pepe admitted before the game.
However briefly it may have been, for a while he looked like he might do that. 7
Kieran Tierney (sub, Kolasinac, 72'): How much grief would Unai Emery have got for switching his full-backs when Arsenal were chasing the game? Tierney's crossing was certainly an improvement but a left-back is not an obvious candidate to change a game. 5
Gabriel Martinelli (sub, Lacazette, 77'): As ever the youngster made an impact. But for a superb save from Mathew Ryan he might have earned Arsenal a point with an elegant header. 6
