The England midfielder scored both goals as the Gunners secured their fourth win of the group stage and the boss was extremely pleased with how he is returning to form after battling niggling injuries.
"He's coming back to a good level now and you could feel that he's started to score the goals as well. I like what I saw tonight," he told Sky Sports.
"I would have liked us to have scored our second goal as quickly as possible but overall we did the job and maybe it was too comfortable for us.
"The positives are that we were strong and we didn't concede but we must remember that we haven't finished the job off and we have to do that in Naples."
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