Kepa replaces Edouard Mendy between the posts, and there are starts for Cesar Azpilicueta and Malang Sarr in the back three. Callum Hudson-Odoi is at right wing-back, with Saul Niguez on the opposite flank and Ross Barkley occupying a midfield role.

Romelu Lukaku starts his first game for nearly two months and is joined by Timo Werner up front.

Andreas Christensen, Reece James and Mason Mount are the only three players to retain their spots from the loss at West Ham. We will be wearing our third shirt for the first time this season.

Zenit make a couple of changes from their matchday five line-up, with the suspended Dmitri Chistyakov replaced by Daler Kuzyaev.

Chelsea: Kepa, Azpilicueta (c), Christensen, Sarr, James, Mount, Barkley, Saul, Hudson-Odoi, Werner, Lukaku

Subs: Bettinelli, Mendy, Alonso, Rudiger, Thiago Silva, Loftus-Cheek, Havertz, Pulisic, Ziyech

Zenit: Kerzhakov; Barrios, Lovren (c), Rakitskiy; Karavaev, Kuzyaev, Wendel, Santos; Malcom, Claudinho; Azmoun

Subs: Odoevski, Byazrov, Krugovoi, Mostovoy, Sutormin, Erokhin, Dzyuba, Ozdoev, Kravtsov, Kuznetsov, Khotulev

The referee is Serdar Gozubuyuk from the Netherlands