The Amsterdam outfit are keen to add the winger to their squad this summer, but have yet to reach an agreement with his current club.Heerenveen sporting director Johan Hansma revealed that the Friezen have turned down a bid from Ajax for Luciano Narsingh.The Eredivisie giants already attempted to lure the winger to the Amsterdam ArenA in the January transfer window, but a move failed to materialise.Nevertheless, Ajax are still keen to sign the 21-year-old, and have been granted permission to open talks with Narsingh, despite seeing their first offer rejected.\"Ajax have already made an official offer, but that has been turned down,\" Hansma said to De Telegraaf.\"We are eager to hold on to Luciano, but we know that he wants to move. We have now told his agent to see whether they can agree personal terms.\"If he doesn\'t sign a new deal with us, we will try to sell him in order to prevent him from leaving on a free transfer next year. However, if nobody meets our demands, we will be more than happy to keep him for another season.\"Narsingh\'s current contract is due to expire in the summer of 2013, and an offer in the region of €6 million could be needed to lure him away from his current club.