The West Ham owners need to up their original offer for Denis Zakaria by a further £4 million if they want to sign him.
According to a report from Tutto Juve, Juventus are holding out for €20 million (£17 million) whilst West Ham have only offered €15 million (£13 million) so far.
The East London outfit have been linked with a move to sign the 26-year-old ex-Chelsea midfielder for a few weeks now.
Hammers boss David Moyes desperately needs to strengthen his central midfield ranks at the London Stadium with Declan Rice set to leave.
West Ham make official bid for Denis Zakaria but need £4m more to sign him
Tutto Juve reckon that that Hammers have made a £13 million offer for the Switzerland International, but need to up that to £17 million in order to get Juventus to sell.
I genuinely think the 26-year-old could be a smart addition for West Ham, especially for just £17 million.

Zakaria is a defensive midfielder by trade but crucially as far as West Ham are concerned, he can play in the centre-back position as as well.
The Swiss international is incredibly dynamic and energetic. He is a tenacious tackler and has the kind of physicality needed to succeed in the Premier League.
If he was given a regular run of games by David Moyes at the London Stadium, I’m certain that he would prove his true worth.
Former BSC Young Boys coach Uli Forte labelled him as an incredible player with exceptional technical ability (Mondo Napoli).
Now, Denis Zakaria is in no way good enough to replace Declan Rice at West Ham on his own.
However, if Moyes brought him to the London Stadium alongside an elite central midfielder, then I believe he’d be a good signing for the club.