Chelsea did not include a buy-back option for Fiyako Tomori.

The Blues academy graduate joined AC Milan this summer after a successful loan at San Siro last season.

Milan paid €29m for Tomori, who they consider "untouchable", according to Fabrizio Romano.

The respected Italian journalist adds that Chelsea did not include a buy-back option like they did in Tammy Abraham's deal to Roma.

Tomori started for the Rossoneri in Wednesday's loss to Liverpool in the Champions League.

The 23-year-old is considered an important player in Stefano Piolo's side.