According to Sky Italia insider Gianluca Di Marzio, West Ham have failed in a bid to sign Leicester City midfielder Esteban Cambiasso.
The Hammers appointed Slaven Bilic as their new manager last week, and then snapped up Sampdoria midfielder Pedro Obiang just a day later.
Even after the arrival of Spaniard Obiang, West Ham still appear keen to improve their midfield options, and are looking to add experience with Alex Song's loan stay from Barcelona over.
Reports in Italy suggest that West Ham were keen to lure former Real Madrid star Cambiasso to Upton Park, with his contract at Leicester set to expire this summer.
With a contract worth more than what Leicester were prepared to offer, West Ham could have felt confident that they could land the Argentine - but Di Marzio believes that Cambiasso has rejected a possible move to East London.
The 34-year-old, who won the Champions League with Jose Mourinho's Inter Milan in 2010, is still mulling over his future and could still stay at the King Power Stadium, but seemingly won't be joining West Ham.
That leaves West Ham looking for other options in midfield, with Croatian boss Bilic no doubt keen to improve his squad quickly ahead of this summer's Europa League preliminary rounds.