Hard to blame him for the goal and he was rarely troubled otherwise.
His pace got him into some great positions, and his headed flick helped force the opener.
Rooted to the spot as Borja ghosted in front of him to score.
Like Mustafi, he was guilty of losing track of Borja when he scored.
Barrow really began to test him in the second half as he was caught second-best on a number of occasions.
Some delightful early balls to put his teammates in position, although he was more defensive in the second period.
His terrible turnover allowed Sigurdsson to score, and he then chopped down Barrow to receive a straight red.
Smashed in the third at the back post and had occasional moments of class in the build-up.
He was often swarmed by the defence, but still managed to make an impact with a scooped ball to feed Ozil for the third.
Hustled his way into an opening goal before firing in from close range to put his side two goals up. Failed more than once to complete his hat-trick.
Dazzling footwork, but a hesitancy to pull the trigger that cost him in a few positions.
Probably will feel that he could have been more commanding on at least one of Walcott's goals.
He was regularly out of position in the opening half, but did better after the break.
Put out two or three fires in the first half, holding together an otherwise shambolic back line.
His missed header played a role in the second, and he allowed Ozil to get in behind him for the third.
No excuses for allowing Walcott to wrestle past him inside the area to score on a cross he should have taken care of.
His turnovers gave Arsenal two great chances on the break, and he placed a late header right at Cech.
His normally reliable passing was nowhere to be found as Arsenal rang rings around him.
His set-pieces were a constant thorn in Arsenal's side, and he finished excellently after Xhaka's turnover.
Little he could do to prevent the Arsenal midfield from controlling things in the opening half.
No real presence for the visiting side out wide, especially when compared to Barrow.
He never stopped trying to create openings, and was Swansea's brightest player. His pace forced Xhaka into a red-card challenge, and he also set up Borja's goal.