The Gunners have been criticised by pundits and some fans for not buying another holding midfielder to support Francis Coquelin, who broke into the first team last season after being recalled from a loan spell with second tier side Charlton Athletic.
The only competition for Coquelin is captain Mikel Arteta, 33, who has just returned from a calf injury after six months out, and an aging Mathieu Flamini, who has only one year left on his contract.
"Everybody has their opinion and everybody is entitled to have an opinion. I could prove to you that it's not necessarily right," Wenger was quoted as saying by the club's website ( when asked about the need for more 'powerful' midfielders by reporters.
"When you don't win, you're wrong and people always find reasons why. Are they the good reasons?
"I think I have enough experience and intelligence to know when it's right and when it's wrong," added the club's longest-serving manager.

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