Alessio Romagnoli made 34 appearances for AC Milan last season
Chelsea have seen a £30m bid for centre-back Alessio Romagnoli rejected by AC Milan, according to Sky in Italy.
It is understood the Serie A club do not want to sell the 21-year-old Italy U21 international in this window.
Romagnoli joined Milan for £21m last summer from Roma, making 34 starts in the Italian top-flight last season, and the country's press have even compared him to some of the great Milan defenders such as Alessandro Nesta and Thiago Silva.