Fulham boss Slavisa Jokanovic is under consideration at West Ham.
Sky Sports says Slaven Bilic's position at West Ham remains in doubt, particularly with all new contract talks postponed until the end of the season.
Jokanovic's work has impressed West Ham's board and he's under serious consideration.
Newcastle United boss Rafa Benitez and free agent Roberto Mancini are also being mentioned as potential candidates.
Jokanovic penned a new deal with ChampionshipFulham in February to 2019.