The City boss told Sky Sports News he hopes to sign Nasri by "the end of the month" - prompting a furious reaction from his Arsenal counterpart.
Speaking at a post-match press conference following the Gunners' 1-1 draw with Hangzhou Greentown on Saturday, the Frenchman branded Mancini's comments "absolutely out of order".
"These comments are not allowed," he added. "They are against the basic rules of football and Roberto Mancini should be informed.
"What we want is respect - we will not comment on footballers at other clubs. It's time football in England came back within basic rules."
Asked if he felt he had been disrespected, Wenger answered: "I cannot say otherwise. This comment is absolutely out of order."
Source: Team Talk
Source: Team Talk