The Rams crashed to their worst home defeat of an already wretched season, eclipsing the 5-0 thrashing they suffered at the hands of another team in claret and blue - West Ham - five months ago.
Ashley Young, John Carew, captain Gareth Barry, Gabriel Agbonlahor and Marlon Harewood all joined Petrov on the scoresheet to keep Villa in the hunt for European football next season.
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