Manuel Pellegrini said it was not a "good idea" for Marko Arnautovic to play for West Ham at Bournemouth amid continuing speculation over the forward's future.
Arnautovic has been linked with a move to the Chinese Super League and the Austria international's agent and brother confirmed he wants to leave West Ham.
West Ham were beaten 2-0 by Eddie Howe's Bournemouth on Saturday, with Arnautovic left out of the squad by Pellegrini.
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And the West Ham boss confirmed Arnautovic was not selected because of the ongoing speculation over his future at the club.