Sporting CP are inviting January offers for Islam Slimani.
The Algeria international has long courted interest from Premier League clubs, with Sporting refusing to do business.
However, O Jogo says Sporting are now willing to sell - and have set a valuation of €20 million.
Slimani's buyout clause is set at €30 million.
West Ham, Southampton, Leicester City and Newcastle United all made enquiries for Slimani last summer.