On-loan forward Simone Zaza is facing an uncertain future at West Ham and could reportedly leave in January.
The Italy international only joined the Hammers on loan from Juventus in the summer but has struggled to make an impact in the Premier League, and has managed just three starts under Slaven Bilic without scoring.
He faces competition from the likes of Andy Carroll and Diafra Sakho when they're fit again and there are already suggestions he will leave in the new year, with the Hammers thought to be unwilling to pay Juve a pre-agreed £20million fee for him if he plays 10 more games after being underwhelmed by his displays so far.
According to reports in Spain, new Valencia manager Cesare Prandelli is keen on signing the 25-year-old as he knows Zaza well from his time as Italy boss.
Napoli are also being tipped to make an offer after they missed out on Zaza in the summer when he chose a move to England ahead of a switch to Naples.