Wenger was hammered after their opening day defeat to Aston Villa.
"We were in a massive crisis after our first game," he said in sarcastic reference to that defeat, one of only four his team has suffered in this calendar year.
"We have kept focused on what was important.
"We have shown a good mental response and desire to improve and that is what we have to keep in the team.
"It is terrible to lose the first game, but it was the first one we had lost since March. I was proven right by our positive response. We have improved, we have good stability so let's enjoy the win against Swansea together, that's all we can do."
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