The Argentina international has struggled to recapture his stellar debut-season form in his second campaign, but he scored one and set up another to help Juve into the Coppa Italia quarter-finals with a 3-2 win over Atalanta.
Dybala is reportedly on the radar of La Liga's giant duo, but Giuseppe Marotta recently said he expects the 23-year-old to remain and sign a new deal which the club have offered him.
Dybala reiterated that no news of a potential move to Spain has reached him and he is ready to go along with negotiations.
"Barcelona or Real Madrid? There's no offers, for me there are no problems for the renewal," Dybala told reporters on Wednesday.
"I'm fine at Juventus, my agent will be in Turin in the coming days for the renewal.
"I'm thinking only about Juventus."
Dybala has scored five goals in 17 games in all competition for Juventus, who take on Fiorentina in Serie A on Sunday.