The West London club will have to pay at least £50m if they are to sign AC Milan defender Alessio Romagnoli in January.
Chelsea previously had offers for the Italy international rejected by the club and are favourites to sign him when the transfer window reopens.
Reports say that Romagnoli, 21, “tops the list of targets” for Chelsea boss Antonio Conte.
It comes as recent reports indicate Juventus centre-back Leonardo Bonucci is at the top of Conte’s list.
Blues also eyeing Carrasco
According to the Daily Mirror, Atletico Madrid are trying get Yannick Carrasco to sign a new contract because of interest from Chelsea Football Club.
Reports have been saying the Blues have been keeping a keen on Carrasco and see the 23-year-old Belgian forward as a potential target for next summer.
