The Benfica centre forward's representative, Pedro Aldave, claims that his client is being looked at more seriously than ever before, with the ball in the Portuguese club's court
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"Benfica knows the situation and now the subject is in their hands," the agent told Sky Sports.
"There has always been interest from Premier League but now this is real interest."
Cardozo has scored 161 goals in 260 games for the Portuguese Liga outfit since joining from Newell's Old Boys in 2007.