Inter travel to White Hart Lane on Thursday to face the man who scored a Champions League hat-trick against them at the San Siro three years ago.
Bale is a much-improved player since then, having already scored 24 goals for club and country this season.
And while Juan has nothing but respect for his opponent, the 21-year-old Brazil international is feeling confident the Serie A side can impress in London.
"He is a great player," said Juan, quoted in 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."