The 17-year-old impressed the Italian club's scouts during his performances for Brazilian top-flight club Coritiba and Brazil's under-17 national team, Xinhua reported on Tuesday citing news portal Terra.
His signing comes despite having undergone knee surgery that will sideline him until April.
The deal is expected to be officially announced in the coming days, coinciding with the opening of the European winter transfer window.
A left-back, Abner was a member of the Brazil team that made the quarterfinals of the under-17 World Cup in the United Arab Emirates in November.
--IANS (Posted on 01-01-2014)