Tomori made 22 appearances for Frank Lampard’s side last season but the 22-year-old did not feature at all after the campaign restarted in June.
Tomori also faces increased competition for a first-team place following Thiago Silva’s arrival on a free transfer from Paris Saint-Germain this summer.
ESPN report that Everton are close to completing a season-long loan deal for Tomori but Rennes and Newcastle United are also interested.
The report also claims that Lampard still views Tomori as a ‘bright prospect for the future’.
Batshuayi, meanwhile, is set to re-join Crystal Palace on loan for the remainder of the season.
The 26-year-old made 24 appearances last season but is not in Lampard’s plans ahead of the new campaign.
Batshuayi spent half a season on loan at Palace last year, scoring 6 goals in 13 appearances.