Juventus have officially opened negotiations with Porto for Rolando, according to La Gazzetta dello Sport.
The Bianconeri feel it is absolutely necessary that they reinforce the defence in January after a spate of injuries.
Gigi Del Neri has been forced to experiment with Simone Pepe at full-back and reintegrate the out of favour Fabio Grosso.
The recent absences of Giorgio Chiellini and Nicola Legrottaglie have only served to make the arrival of a new defender all the more imperative.
La Gazzetta understands Juventus general manager Beppe Marotta and an intermediary called Peppino Tirri are now working towards signing Rolando, making an official approach.
The 25-year-old has two Portugal caps to his name and has made 10 appearances so far this season for Porto who lead the Liga Sagres by 10 points.