The Spaniard keeps his place in midfield after impressing against Middlesbrough, with PFA and Football Writers Player of the Year, N'Golo Kante, on the bench following his return from injury.
Otherwise the Blues XI is to be expected, with Diego Costa leading the line alongside Eden Hazard and Pedro, with Willian on the bench.
West Brom, meanwhile, name teenager Sam Field in their side for their final home match of the campaign after he impressed against Burnley last time out.
He will offer support for Salomon Rondon up front as the Baggies look for their first win since they beat Arsenal at the Hawthorns on 18 March.
West Brom: Foster; Dawson, McAuley, Evans, Nyom; Brunt, Livermore, Fletcher, Field, McClean; Rondon.
Chelsea: Courtois; Azpilicueta, David Luiz, Cahill; Moses, Matic, Fabregas, Alonso; Pedro, Diego Costa, Hazard.