The Serb has less than a year to run on his current deal.
Vidic said in The Sun following Sunday's 2-0 Community Shield victory over Wigan Athletic: "I'm not expecting anything. I'm just trying to perform as best I can and we'll see where I am and what the plans are.
"I'm not worried. I never like to make promises about how many games I could play, but I feel good."
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