Diego has been linked with a move away from the Old Lady after failing to make an impact since joining the club from Werder Bremen in a €24.5million deal last summer.
“I have a five-year contract, but the future depends not only on me,” the Brazilian told TuttoJuve.com.
“We need to improve, everyone at Juve must improve,” the 25-year-old added.
“I’m disappointed, we need to analyse what went wrong and see what we can do for next season.”
