Thibaut Courtois has recovered from injury to get the nod ahead of Petr Cech, while Cesc Fabregas and Diego Costa also start in the Blues' final pre-season run-out before the new campaign gets underway.
Fellow new boy Filipe Luis misses out, however, settling for a place among the substitutes.
Sociedad will be looking to bounce back from their late defeat against Newcastle United last time out and end their tour of England with a positive result.
Chelsea: Cech, Ivanovic, Cahill, Terry, Ake, Matic, Fabregas; Ramires, Hazard, Schurrle, Diego Costa
Real Sociedad: Zubikarai, Zaldua, Ansotegi, Inigo Martínez, De la Bella, Markel, Pardo, Granero, Prieto, Canales, Agirretxe
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