Gunners boss Arsene Wenger said: "We had more penetration, a quicker and sharper game, we had a different focus to Tuesday [The defeat to Swansea].
"It was a repetition of the Crystal Palace game, when we were 4-0 up after 20 minutes. I believe the speed of our game was very good, good finishing as well."
On Ramsey he added: "He is calm in finishing, he used to rush it. Over the years I think he can get 10-15 goals a season."