West Ham hold 'trump card' in 'push' for £16m deal at London Stadium

West Ham United are ‘pushing’ to sign Filip Kostic and the London Stadium target’s agent could mean they have a ‘trump card’, according to talkSPORT reporter Alex Crook.

The Hammers have made four signings since the summer transfer window opened for business, with the quartet setting them back more than £80million, but boss David Moyes is looking to add further reinforcements.

West Ham made their interest in Kostic clear by launching a bid for the Eintracht Frankfurt star earlier this week.

Although the Hammers’ £12.5million offer was rejected, they remain in negotiations with the Bundesliga club.

It is understood that Frankfurt are seeking up to £16million for Kostic, but West Ham are confident of being able to agree a fee between the two clubs’ valuations.

The Hammers are eager to pounce as the 48-cap Serbia international has entered the final 12 months of his £43,000-per-week contract.

Transfer insider Dean Jones has previously told GIVEMESPORT that West Ham are ‘optimistic’ that Kostic will head to the London Stadium before the September 1 deadline.

Crook understands that West Ham are continuing to pursue Kostic and could persuade the 29-year-old to make the move with a more lucrative contract.

The talkSPORT reporter believes the big-money arrival of Gianluca Scamacca could also play into the Hammers’ hands as the Italian striker is represented by the same agent as Kostic.

Crook told GIVEMESPORT: “Obviously, West Ham can offer more in wages. They’re still pushing and are still hopeful.

“I think they’re hoping their trump card can be the fact that he’s got the same agent as Scamacca.”

Frankfurt are keen to hold onto their wing-back and boss Oliver Glasner has revealed he is confident, as it stands, that Kostic will