The Premier League duo are keen on the Sporting midfielder, who is set to turn out for Portugal in the Euros final on Sunday, but face competition from Napoli, Goal understands
Crystal Palace and Stoke City have enquired about the availability of Sporting and Portugal midfielder Adrien Silva but they will have to compete with Napoli for his signature, Goal understands.
Adrien could help Portugal win its first ever major trophy when the nation takes on France in the Euro 2016 final on Sunday and he will likely start for his country.
All the three clubs have opened discussions with Sporting about the possibility of acquiring his services, but none of them have yet made a formal offer, with the player focusing on international football.