Gomez appears close to a Valencia switch, forcing the Hammers to kick off discussions with Eintracht regarding a potential £40-million move for the 25-year-old Haller, according to The Guardian's Jacob Steinberg.
Manuel Pellegrini is looking to add a forward to the West Ham ranks following Marko Arnautovic's £22.4-million move to Shanghai SIPG. Andy Carroll was also released and Lucas Perez was shipped to Alaves, further weakening the Hammers' attacking ranks.
Haller, who has also been linked with a move to Manchester United amid reports of Romelu Lukaku's impending exit, had a breakthrough 2018-19 Bundesliga campaign with Die Adler. The Frenchman bagged 14 league goals as part of a lethal front-three with Real Madrid-bound Luka Jovic and Ante Rebic.