Arsenal lost 0-1 to Leicester City last week but Arteta is happy with how the squad reacted to it.
The squad has been working hard to gather more points on their side, and successfully did that with a 3-0 win over Dundalk in the Europa League which was on Thursday.
“We made it look easy because we were very disciplined, took it seriously and were at it from the beginning,” Arteta said.
“We made a lot of changes, gave opportunities to other players and I think they performed well.
“We have a large squad and I wanted to give opportunities to everybody. Today they showed they were prepared when I need them and today they made it more difficult me for selection.
“Sometimes it is about the quality, sometimes it is about the tactical plan for the game. I am very pleased with the performance today.
“We missed Willian the last couple of weeks, he had a very short pre-season. He needs that bit of rhythm. He looked good today, great to get some minutes in his legs.
“After losing the way we lost against Leicester it was painful. It took is a few days to react but good to respond straight away with a win and now we go to Old Trafford and try to win again.”
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