William Carvalho is understood to want a move to West Ham United, but the Premier League outfit will have to table an extra €6 million to land him.

The Irons are the only club to submit a serious offer for the defensive midfielder, according to The Telegraph's Jason Burt, but they need to dig a little deeper to meet Sporting CP's listing price of €38 million (£34.6 million) plus €5 million in add-ons.

West Ham is still confident of signing the 25-year-old for what would be a club-record fee - eclipsing the £25 million laid down for Marko Arnautovic earlier this summer - and would slot him immediately into a 4-3-3 formation, a system Slaven Bilic is now adopting.

The east London club looked overrun in midfield for much of the 2016-17 campaign, with even local hero Mark Noble attracting criticism for not outwardly showing the industry and physicality he's known for. Carvalho should certainly address this supposed dearth, and he's keen on making the next step in his career after making his professional debut for Sporting in 2011.

Carvalho started five of Portugal's seven matches en route to winning the European Championship in 2016, and can play as both holding midfielder and, through his dribbling ability, a box-to-box operator.

(Photo courtesy: Action Images)

The burden on West Ham's wage bill may be lessened by the time West Ham and Sporting potentially reach an agreement, with Robert Snodgrass, the £10.2-million January signing from Hull City, told he can leave the club after failing to make a significant impact at the London Stadium.

Snodgrass' former manager at Leeds United, Simon Grayson, admitted he'd be open to acquiring the Scot for his new regime at Championship side Sunderland.

"When people like him become available you would be foolish not to consider it," said Grayson on Friday, as quoted by BBC Sport.

"That would be a deal dictated by finances. Can we do it? Who knows, but we might ask the question."