The Welsh winger has been in captivating form as of late, and tormented the Italians two years ago when they met in the Champions League.
While Juan respects the 23-year-old, the Brazilian insists that his side will not be frightened by Bale.
"He is a great player," Juan told the Daily Star.
"He is doing so well but me and my team don't fear anyone. I believe we can play our football and do well."
Inter travel to White Hart Lane to face Spurs on Thursday night.