According to reports from Calciomercato, Krzysztof Piatek has rejected offers from Crystal Palace and Genoa.
The 24-year-old joined AC Milan from Genoa for €35m (£29.8m) a year ago, but his form has dipped.
The Poland international scored 11 goals last season, but so far has managed by four goals in 17 Serie A appearances this season.
Milan have signed Zlatan Ibrahimovic, and this could consign Piatek to the Rossoneri bench. However, he has rejected an offer from Crystal Palace, as he only wants to leave AC Milan for a club of similar stature.