Marko Arnautovic remains unsettled at West Ham.
The Daily Mail says Arnautovic is frustrated after finding himself frozen out by manager Manuel Pellegrini with West Ham facing another transfer saga this summer.
Arnautovic has not started since the closure of the January transfer window, when he tried to force through a £35million move to the Chinese Super League.
He signed a one-year extension after agreeing to stay at West Ham - a deal which was announced 22 minutes after the club were knocked out of the FA Cup by Wimbledon.
The contract, which runs until June 2023, is understood to include performance-related incentives but he has been unable to trigger them from the bench.