West Ham boss Manuel Pellegrini remains in the market for defensive recruits, despite signing seven new players so far this summer.
The Hammers have bolstered their options at the heart of defence following the captures of Issa Diop and Fabian Balbuena but the latest injury setback suffered by Winston Reid has left Pellegrini looking to dip into the market once again.
West Ham have been heavily linked with Besiktas’ Domagoj Vida, following his fine performances for World Cup runners-up Croatia in Russia, and Fanatik reports the Hammers have submitted an improved bid.
The 29-year-old is also a target for Ligue 1 giants Monaco, who can provide the experienced defender with Champions League football, but West Ham are looking to steal a march on their continental rivals by submitting a new bid.
West Ham are already reported to have seen a €25m (£22m) bid turned down by Besiktas, who have also rejected Monaco’s offer of €30m (£26.7m).