Albion have reportedly offered around £21 million for the midfielder, and the bid is being considered by Sporting Lisbon.
Much hype has surrounded many young talents after transfers but who have been the flops who have failed to live up to their name?
The Liverpool winger has been linked with Newcastle United.
ADO Den Haag manager Zeljko Petrovic has ruled out a departure for Leeds United linked Tom Beugelsdijk.
Sunderland are reportedly interested in securing the services of Torino goalkeeper Daniele Padelli.
West Brom have allowed full back Cristian Gamboa to join Celtic.
HITC Sport understands Leeds see bid for League Two star rejected.
Liverpool have had a very busy summer in terms of transfers.
Crystal Palace are reportedly set to reject a new move from Tottenham for Wilfred Zaha, worth a total of £26m.
Stars of Manchester United, Chelsea and Leicester City are among those selected.