Levski Sofia v Chelsea
Chelsea captain John Terry is a doubt with a back injury but fellow central defender Khalid Boulahrouz should return from an eye infection.
The return of Boulahrouz will allow Paulo Ferreira to move back to his more regular right-back role after he partnered centre-back Ricardo Carvalho.
Midfielder Michael Ballack, suspended for three domestic games, is also set to return in midfield.
Levski left back Lucio Vagner will return after a one-game ban.
