The 21-year-old has been a hit at Porto after joining the club from Vitoria Setubal last year.
“I have a contract until 2012 and the club officials want me to add another year to that,” he told Sky Sports.
“That shows they have trust in me and I am proud of that.
“I also know there are big clubs looking at me, and Tottenham is one of them and that is fine.
“I will talk with my club and we will see what happens from there.
“We will just wait until the end of the season and then see.”