West Ham have offered £27million for Sporting Lisbon midfielder William Carvalho.
Sportsmail revealed the London Stadium club's interest on Wednesday and they remain hopeful of striking a deal for the 25-year-old Portugal international as he is keen on a move to London.
Sporting have proved difficult to negotiate with in the past and are holding out for closer to his reputed £39million buy-out clause but are open to a compromise as talks progress.
The Portugal international would look to command wages of around £100,000 a week.