The defender has not featured since joining the Blues, but having built up his fitness since starting training last week, that changes with Frank Lampard’s first cup selection of the season.
Another new signing, Ben Chilwell, is on the bench. Overall Lampard makes eight changes to the side that started against Liverpool.
Willy Caballero, Fikayo Tomori, Cesar Azpilicueta, Emerson, Ross Barkley, Callum Hudson-Odoi and Tammy Abraham are the others who are handed their first starts of 2020/21. Kai Havertz, Mason Mount and Mateo Kovacic feature from the off for the second time in four days.
Young keeper Nathan Baxter is named on the bench for the first time, while a former Blues keeper, Bradley Collins, is in goal for Barnsley.
Chelsea (4-2-3-1): Caballero; Azpilicueta (c), Tomori, Thiago Silva, Emerson; Barkley, Kovacic; Hudson-Odoi, Havertz, Mount; Abraham.
Subs Baxter, Zouma, Chilwell, James, Jorginho, Giroud, Werner.
Barnsley (5-3-2): Collins; Ludewig, Sollbauer, Halme, Williams, Styles; Ritzmaier, Mowatt, Woodrow; Frieser, Schmidt.
Subs Walton, Oduor, Moon, Simoes, Chaplin, Adeboyejo, Thomas.
The referee is Darren Bond.