New England Revolution goalkeeper Djordje Petrovic will have his Chelsea medical on Thursday after his £14million transfer was agreed on Monday.
Chelsea also expect to confirm the signing of striker Deivid Washington from Santos.
While it is not yet clear whether Petrovic's deal will be immediate or delayed, the Blues are after a new goalkeeper with Kepa Arrizabalaga notably moving to Real Madrid on loan.
Mauricio Pochettino's side have recently acquired Robert Sanchez from Brighton, with the former Seagulls shot-stopper going on to start in both of Chelsea's opening Premier League games this season.