Virtua Tennis 3 - Platform: Playstation 3

Frying Pan racket:
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Get three strikes in a row in the Pin Crusher mini-game. 

Unlock Extra Players:
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Select Tournament Mode and win every singles match with the required rank.

Unlockable - How to Unlock 

Duke - Get a "C" rank or higher and defeat him
King - Get a "D" rank or lower and defeat him 

Guitar racket:
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Defeat Duke or King in a SPT final to unlock the Guitar racket. 

Wooden racket:
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Win King Of Players mode to unlock the Wooden racket.