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.
The 24-year-old scored 30 goals in all competitions during the previous campaign but has managed just four this term.
The Rossoneri have also since brought back Zlatan Ibrahimovic, while the Premier League side are in need of a new No 9 after losing Wesley to an ACL injury.
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