West Ham have reportedly told Sunderland they will have to meet their Â£15million asking price to sign striker Diafra Sakho this summer.
The Black Cats are very interested in the forward and have apparently already lodged one offer in the region of Â£11million for the Senegal international, as boss Sam Allardyce looks for frontline reinforcements ahead of next season.
However, the Hammers value the 25-year-old at Â£15million minimum and will not accept anything less when the transfer window reopens next month.
Sakho joined West Ham from Metz two years ago and, after impressing in 2014-15 with 12 goals in all competitions, he added another seven last season despite having to battle for a place in the starting line-up alongside the likes of Dimitri Payet, Enner Valencia and Andy Carroll.
Boss Slaven Bilic is expected to sign at least one striker this summer for big money so that would allow Sakho to move on – but only for the correct fee.
Meanwhile, reports elsewhere suggest the club will resist all offers for Payet in the window – if any are forthcoming – with the Hammers valuing the France international at at least Â£60million.