Chelsea have made two changes from their draw against West Ham. Zappacosta and Christensen come into the fold to replace Moses and Antonio Rudiger respectively, with the latter missing from the gameday squad entirely.
Southampton have made one change from their defeat to Arsenal. Jack Stephens’ late dismissal against the Gunners rules out of action due to suspension, with Bednarek replacing him in the backline, who makes his Premier League debut. Long continues to lead the line, despite Austin’s strike last week.
Chelsea subs: Willy Caballero, Ross Barkley, Pedro, Tiemoue Bakayoko, Victor Moses, Olivier Giroud, Emerson.
CHELSEA (3-4-3): Thibaut Courtois; Cesar Azpilicueta, Gary Cahill, Andreas Christensen; Davide Zappacosta, Cesc Fabregas, N’Golo Kante, Marcos Alonso; Eden Hazard, Willian, Alvaro Morata.
Southampton subs: Charlie Austin, Mario Lemina, Sofiane Boufal, Manolo Gabbiadini, Sam McQueen, Josh Sims, Fraser Forster.
SOUTHAMPTON (3-4-3): Alex McCarthy; Jan Bednarek, Wesley Hoedt, Maya Yoshida; Cedric Soares, Oriol Romeu, Pierre-Emile Hojbjerg, Ryan Bertrand; James Ward-Prowse, Dusan Tadic, Shane Long.