Arsenal were in the ascendancy against Sevilla from minute one, with Gabriel Martinelli bursting clear down the left and giving Juanlu Sanchez the first of many headaches to earn the Gunners a corner that brought about a shocking miss from Kai Havertz.
The home side were largely untroubled throughout the first half, and Leandro Trossard finished off a stunning move involving Jorginho and Bukayo Saka in the 30th minute to turn dominance into scoreline superiority.
The second half saw more or less the same level of dominance from the hosts, and the Gunners made Sevilla pay with a well-taken solo goal from Saka to double the lead on 64' minutes.