Bob Bradley's first game as Swansea head coach ended in agonising defeat as his side were beaten by 10-man Arsenal in an engrossing clash in north London.
The Swans had won here on their previous two visits and had not lost away to Arsenal in over five years but, despite threatening a comeback, they succumbed to a 3-2 loss that sent the Gunners level with Manchester City at the top of the table after six consecutive league wins.
Theo Walcott was all-but gifted a brace that put Arsenal in complete control of this game.
But Granit Xhaka, who would later be sent off by referee Jon Moss, gifted a goal to Gylfi Sigurdsson to bring Bradley's side back into the game.
Birthday boy Mesut Ozil restored Arsenal's two-goal cushion with a well-taken volley but a first Swansea goal for record-signing Borja Baston kept things nervy for the Gunners, who played with 10 men for the final 20 minutes after Xhaka was shown a straight red card for bringing down the impressive Modou Barrow.
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But how did they rate? John Cross was there...
Arsenal
Cech 7
Made a string of vital late saves, was always there in the right position.
Bellerin 7
His pace was so important for Arsenal both in attack and defence.
Mustafi 7
What a superb signing he is proving to be. A warrior through and through.
Koscielny 7
Forming lovely partnership with Mustafii. Brilliant challenge on Barrow.
Monreal 4
Barrow tore him apart, his lack of pace horribly, horribly exposed.
Cazorla 8
For the first 70 minutes he ran the game.
Xhaka 4
Sent off. Lost the ball on Swansea's first and got red carded for scything down Barrow.
Walcott 8
MotM. Scored twice, could have had four, ran himself into the ground.
Ozil 7
Scored a beautiful goal, a superb volley and was lively throughout.
Iwobi 7
One dribble in the second half was just sublime. Blossoming so quickly.
Sanchez 8
Going from strength to strength in the central role. A marauding performance.
Substitutes
Coquelin, for Iwobi, 68 mins, 6
Oxlade-Chamberlain, for Ozil, 82 mins
Gibbs, for Sanchez, 82 mins
Swansea
Fabianski 7
Normally does well against his former club, but had no real chance this time.
Naughton 7
Solid performance, got forward and defended very well. Undervalued player.
Fernandez 5
The Swansea defence was wide open, pulled apart and Fernandez was exposed.
Amat 5
Terrible mistake on Arsenal’s opener. Kamikaze defending. Poor display.
Taylor 6
Booked. Struggled against Arsenal's pace and was badly exposed.
Cork 5
Awful header in his own box led to Arsenal’s second goal.
Britton 5
Subbed early and didn't influence the game in Swansea's midfield.
Fer 6
Had three big chances but fired over and his other two were hit at Cech.
Barrow 8
His pace destroyed Monreal and ultimately Arsenal couldn't cope with him.
Routledge 6
Played on the left for his pace, but nowhere near as quick as Bellerin.
Sigurdsson 7
Wonderful finish to get Swansea back in it. He has a touch of quality.
Substitutes
Baston, for Britton, 60 mins, 7
Ki, for Cork, 71 mins, 6
Rangelat, for Barrow, 83 mins