Midfielder Frank Lampard and defender John Terry both missed England's Euro2012 qualifier with Switzerland on Tuesday due to injury but Ancelotti expects them to be able to take their place at Upton Park as the Blues try to maintain their perfect Premier League record so far this term.
"Lampard had (hernia) surgery on Tuesday and I think that he will start to train this week," he said.
"I don't know when but we will see how he trains and we will take a decision for the game against West Ham.
"Terry didn't have surgery but he used the last week to improve his hamstring.
"He will start to train with the squad this week, maybe Tuesday, and I think he will be able to play against West Ham."