He says club representatives are currently in Lisbon attempting to close the deal for the Portuguese international and negotiations have been going on for more than a week. Sporting are attempting to hold out for €40m (£36.1m) but are aware that the 25-year-old is keen to finally move to the Premier League club.
He adds that It is not thought that West Ham will go as high as €40m for Carvalho but talks remain positive between the two clubs and sources close to the deal are optimistic it can be done.
The highly-rated midfielder, who has been linked to a number of big Premier League clubs in recent seasons, including Arsenal, is understood to be aware of the fact that he needs to move to further his career.