Callum Hudson-Odoi returns to the attack as Thomas Tuchel makes two changes to the side that played in the last Premier League outing, at Wolves a week ago.
The young winger starts a Premier League game for the first time since the home draw with Man United a month ago, and replaces Hakim Ziyech. There is a rest for Cesar Azpilicueta, with Trevoh Chalobah dropping back to play alongside Thiago Silva and Toni Rudiger in defence.Jorginho will partner N’Golo Kante in midfield.Edou Mendy is in goal after Kepa’s midweek cup appearance.
Aston Villa also make two changes with Morgan Sanson and Danny Ings coming in for John McGinn and Ashley Young.
Chelsea: Mendy; Chalobah, Thiago Silva, Rudiger; James, Kante, Jorginho (c), Alonso; Mount, Pulisic, Hudson-Odoi.Subs: Kepa, Azpilicueta, Christensen, Sarr, Kovacic, Saul, Barkley, Ziyech, Lukaku.
Aston Villa: Martinez; Cash, Konsa, Mings (c) Targett; Sanson, Douglas Luiz, J Ramsey; Buendia, Ings, Watkins. Subs: Steer, Tuanzebe, Hause, Chukwuemeka, Iroegbunam, Traore, Trezeguet, El Ghazi, Davis.
The referee is Martin Atkinson.