Talking of West Ham, Sky Sports reports that they "are close to signing William Carvalho from Sporting Lisbon and will pay his £40m release clause."
However, it adds that "there is an awareness the deal needs to be done soon because other clubs have been alerted to his availability."
The Hammers have been linked with a move for Carvalho throughout the window, having reportedly already had an offer turned down.
The 25-year-old came through the ranks at Sporting and was part of Portugal's Euro 2016-winning squad.