The Italian defender was forced off in the first-half in the defeat to Liverpool on Sunday after a reoccurrence of a thigh injury he recently picked up.
The 25-year-old was confirmed to be out for a couple of weeks, and Frank Lampard gave an update on his condition and when is return date would be.
"Emerson is the other side of the international break," Lampard added in his pre-match press conference of Brighton on Friday afternoon.
Marcos Alonso will continue to take the reigns at left-back in Emerson's absence.
The international break is in two weeks, so Emerson could return as early as the Blues' home game against Newcastle United on the 19th October.