Arsenal were stunned by Sheffield United at Bramall Lane on Monday evening as the Blades pulled off their biggest result yet since their return to the Premier League.
The Gunners failed to match their hosts' slick pass-and-move football and fell behind in the first half when Lys Mousset turned in from close range after a corner.
Arsenal stars like Pierre-Emerick Aubameyang and Nicolas Pepe were kept relatively quiet and struggled to create many clear openings.
Chris Wilder's team had to hold on in the second half but were still well worthy of the victory and a crucial three points.
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