West Ham are reportedly stepping up their interest in Islam Slimani ahead of the summer transfer window.
The Hammers were linked with the Algerian in the summer but he remained at Sporting Lisbon.
Italian website TMW report: "The Hammers want to strengthen in January to maintain the excellent ranking position in the Premier League, and as discovered by TMW the name tops the list is the attacker of Sporting Lisbon. The parties are negotiating."
Slimani was also wanted by Leicester City in the summer, who had a €6 million offer rejected, and today's report suggests Sporting are holding out for €10 million.
Last season's Primeira Liga runners-up were eliminated from the Champions League last week, a competition in which Slimani scored twice in six games this season.
He has a record of eight goals in 15 games in all competitions this season.
West Ham already have multiple options up front, so the logic behind going for a striker would suggest one of Mauro Zarate or Ricardo Vaz Te could even be allowed to move on.
Diafra Sakho is off to the African Nations Cup in January, but Slimani too will represent his country at the tournament, which could yet scupper the chances of a January deal.