David Moyes says he will send out a young, experimental West Ham side to face FCSB in Romania in their final Europa Conference League group game.
West Ham host Crystal Palace in a London derby on Sunday (14:00 GMT) and Moyes plans to rest key players when they play in Bucharest.
Freddie Potts - son of former Hammers skipper Steve Potts - Keenan Forson and Oliver Scarles may be involved.
"We've left the bulk of the players back home," said Moyes on Wednesday.
"We're going to give some of the younger players an opportunity in the game.