#2 Swansea's fleet-footed forwards trouble Arsenal back-line
Although Arsenal enjoyed the bulk of the possession (77.4% in the first half alone), the Swans played well on the counter-attack. But their chances on goal were borne out of putting pressure on Arsenal's back-three.
The first goal came via an error from Laurent Koscielny when he tried to intercept a cross-field ball. Tammy Abraham, playing on the French defender's shoulder, was quick to react and as Koscielny slipped over and fell to the turf, Sam Clucas made a run from the left to overload the defence.
Hector Bellerin was facing the wrong way and he was caught in two minds - cover the pass or the wing-back's run. He ultimately did neither, finding himself in no man's land, allowing Clucas to angle his run to receive Abraham's through ball and slip the ball past the onrushing Petr Cech to make it 1-0.
Jordan Ayew could have easily doubled the swans' lead just before the break when he out-muscled Per Mertesacker (who also fell to the turf after losing the battle). All the Ghanian had to do was square the ball but he took the shot instead and Cech was lucky enough to make himself big and deflect the effort.
But had Ayew passed, the score would have read 2-0 before the break.