Going down to 10 men in the first half made it an impossible task for the home side to come back into the game against Arsene Wenger’s men, despite Robert Snodgrass’ late penalty
Alexis Sanchez’s double and goals from Theo Walcott and Granit Xhaka made the difference for the Gunners, who recovered from their midweek draw with Paris Saint-Germain in the Champions League.
The Chile attacker opened the scoring after just 17 minutes and could have doubled his tally when he stepped up to take a penalty, but failed to convert.
Having Jake Livermore sent off in the first half made it a seemingly impossible task for Hull to get anything out of it, and Walcott made things more comfortable when he added a second goal in the 55th minute.
Things got a bit nervier for Arsenal towards the end with Robert Snodgrass converting a penalty, but Sanchez was on hand again before Xhaka fired one in to round off a comfortable afternoon.