The 25-year-old has impressed for Porto since joining the club in 2008 and was strongly linked with a move away from the club during the January transfer window.
Rolando’s agent Peppino Tirri told calciomercato.it: “Yesterday there were observers to follow him (in the friendly Portugal-Argentina) from many clubs including Inter Milan, Juventus, Manchester United and Liverpool.
“There are possibilities he arrives in Italy, we will work from here to June but there have been approaches with Juventus and Inter.
“The player’s rating is very high. €15million? Even a little more.”