Wenger’s men play host to West Brom at the Emirates on Saturday, and the Frenchman has warned that the importance of the game must not be underestimated.
"I believe that we are in a position where the last thing that should creep in is complacency," he told reporters.
"We have come so far from difficult times. I believe we have an intelligent group and so we need to realise that there is a lot more for us to achieve to come back into a stronger position.
"For us it is of course a vital game on Saturday. We are coming back into a better position in the league. We feel at home we are managing to win games and we want to continue to do that.
“What was important at Chelsea was that we won a big game, which is important for confidence.”
The Gunners were held to a draw against Marseille in their Champions League meeting on Tuesday, but the 62-year-old said that his side should have won the match.
"The Marseille game was a difficult one because we were on such a high after Saturday which made Tuesday night a bit more difficult,” he continued.
“But having had a chance to watch it again we produced enough chances to win the game."
A number of key players were rested for the match, further reinforcing the Frenchman’s point that the West Brom game should not be underestimated.
“[Robin van Persie] was a bit on the edge after the Chelsea game but he was not injured,” he added.
“He was just very tired after Chelsea.
“On Tuesday the question was do I play him an hour and take him off or put him on in the last half-hour if needed. I chose the second option.
“The negative is that we didn't win, the positive is that he didn't get injured.
“[Laurent] Koscielny was on the edge on Tuesday night because he had a very good game on Saturday.”
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