Angelo Ogbonna said on Tuesday he was not a traitor after joining Serie A champions Juventus from city rivals Torino.
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"I'm an ambitious person and this represents a great opportunity for me to develop as a player," the defender told reporters on his official presentation.
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"I always look at the present and future. I don't consider myself a traitor because I've always underlined the fact that we're professionals.
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"I've received more advice than criticism over the past few days."
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Ogbonna helped Torino to climb out of Serie B in 2011-12 and establish themselves in the top flight last season.
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Born in Italy to Nigerian parents, the 25-year-old has won six caps for Italy and was included in the squad for Euro 2012.
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Juventus said he was the 11th player to make the move from Torino.