Win Tournament With One Match
Press [Circle], [Left], [Circle], [Right], [Circle], [Up], [Circle], [Down] at the main menu. Then win one match to win the whole tournament.
Hints
Unlock Extra Players
Select Tournament Mode and win every singles match with the required rank:
Duke - Get a "C" rank or higher and defeat him.
King - Get a "D" rank or lower and defeat him.
Unlock Frying Pan
To unlock the Frying Pan as a tennis racket, get three strikes in a row in the Pin Crusher mini-game.
Unlock Tennis Racket
In world tour when you hit 10 MAX serves the SPT Administration will congratulate you on your serves through your mailbox. They will say they sent you a racket.
The second way to get a racket is to get 10 medals in the tennis academy.