Aston Villa are stepping up their interest in Krzysztof Piatek, offering €30m (£25.5m) for the Milan striker.
Links between Villa and Piatek first emerged just hours ago, but Gianluca Di Marzio reports that has now turned into a formal bid.
Milan paid Genoa €35m for the Pole last January, and it is believed they will part with him if they receive an offer close to that.
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