Already an England international, Tomori has been tipped for a bright future and if he impresses in the second half of the season then Milan may well see the £25m option to buy as a bargain.
Lampard has indicated in recent weeks that he sees Tomori as part of his future plans at the club, but the relatively low option to buy fee suggests Chelsea don’t share the same view.
And Chelsea’s hierarchy may well see this as an opportunity to free up some space to make a move for long-term target Rice.
Chelsea were reluctant to meet West Ham’s £80m asking price last summer, but their interest reportedly hasn’t dwindled.
Reports have suggested that Chelsea are particularly keen on Rice’s versatility to play in defence and the holding midfield role.
Selling Tomori in the summer would not only free up some cash to sign the 22-year-old, but also a spot in Chelsea’s squad.