Sporting CP have rejected a bid from Manchester City for Rui Patricio.
A Bola says City made an initial £5.8m (€7m) bid for Patricio that was swiftly rejected by club bosses in Lisbon.
But Patricio is available for the right fee and Sporting bosses are reportedly realistic about their chances of retaining him after he helped Portugal win Euro 2016.
And it is claimed officials at the Estadio Jose Alvalade will listen to offers of £16.8m (€20m) or more.