United are reportedly keen to bring in the 22-year-old as an long-term replacement for Patrice Evra.
“I cannot say anything as I am focused on playing well for Valencia,” Alba said.
“My representatives are there to handle everything that happens at a higher level. I am not thinking about these things because I do not know if they are true or not.
“I am very happy here and I only think about maintaining and then improving. Anything else is for my representatives to deal with.”
Valencia are reportedly ready to offer Alba a new contract with the club.
“I have heard these rumours, but I don’t know,” he said.
“All I want is to play and to do as well as I can on the pitch. My representatives and Valencia will speak when the time comes.”
