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Marek Hamsik has extended his contract with the club for another three years. The current contract of the Slovak national team member was set to expire after the next season.
The 24-year-old footballer arrived in Naples in 2007 from the team "Brescia" where he played since he was seventeen.
The attacking midfielder, who has attracted the interest of several European clubs, has already represented his national team more than 50 times.
This season he has played 43 matches for "Napoli".