Forlan has also attracted the attention of Marseilles after a fine season for the Spanish side - he scored twice in the Europa League final victory over Fulham - but any transfer negotiations will have to wait until after the World Cup.
His agent, Daniel Bolotnicoff, said: "Forlan is a player who a lot of people are interested about in the European market. Each of the seasons many clubs show interest in him.
"This is not the first time that a Premier League club have wanted to try to buy him back. At the moment, though, he is concentrating on the World Cup finals."