Reports earlier this week suggested that Wigan are leading the chase to sign the Argentine striker.
“At the moment, everything is still up in the air with that one,” Martinez told the Wigan Evening Post.
“It is true he is a player we have been following for a long time, but I can’t confirm anything regarding an offer.
“Over the next few weeks we hope to finalise a few things with the players we have been trying to get.
“Mauro is one of a number of names that will come out because we have been following a lot of players.”
