General director Giuseppe Marotta announced on Wednesday that the Turin outfit were close to signing the 24-year-old and they are now on the brink of completing a deal.
Visite mediche in corso per Alex Sandro! pic.twitter.com/584xs3VgeC— JuventusFC (@juventusfc) August 20, 2015
The Brazilian defender started his professional career with Atletico Paranaense and also wore the jersey of Santos before joining Porto in 2011.
He had since developed into a key player for the Portuguese giants, but a transfer became inevitable after he refused to sign an extension to his current contract, which expires next summer.
Atletico Madrid also showed an interest in signing Alex Sandro prior to Juve striking a deal.
The former Santos star becomes Juventus' seventh signing of the transfer window after the previous arrivals of Mario Mandzukic, Sami Khedira, Paulo Dybala, Simone Zaza, Neto and Guido Vadala.