The San Siro giants have won just two of their subsequent eight League matches.
"After the win in Turin, we have no longer been compact and there has been a dip in fitness," the veteran told the Corriere dello Sport.
"We've suffered a few injuries too, the substitutes bench has thus become shorter and things haven't always gone our way.
"But it is now up to us to react and get into the top three and I'm convinced that we will be able to do that."
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