All the squad returned back fit, apart from N'Golo Kante who left earlier on to continue with his knee rehabilitation.
Fierce competition in the midfield for Frank Lampard as two key spots will be up for grabs.
Three forwards are available for Sunday's game, but after scoring against Barcelona, Tammy Abraham could be the one to get the nod.
Mason Mount or Ross Barkley - the pair have been sensational in pre-season but only one can start in the 4-2-3-1 system, and with the youth of Mount and Lampard's likeness of the midfielder, he could be given a start.
Predicted XI to face Reading: Arrizabalaga; Emerson, David Luiz, Zouma, Azpilicueta; Jorginho, Kovacic; Pedro, Mount, Pulisic; Abraham.
It gets underway at 3pm UK time at the Madejski Stadium on Sunday - live on Chelsea FC's 5th Stand App.