Sega Sports Tennis Cheats

Sega Sports Tennis Unlockable: Alien Force Racket
Beat the level 4 Alien Force Volley training.

Sega Sports Tennis Unlock Lleyton Hewit & Marat Safin
On the Main Menu input L1, R1, L1, R1, CIRCLE, CIRCLE, CIRCLE, UP, UP, UP, DOWN, DOWN, DOWN. (Unverified)

Sega Sports Tennis Unlock King or Queen
To unlock the King or Queen, win all of your matches in Arcade mode without using continues. If you're male, you'll face King. If you're female, you'll face Queen. Beat them to unlock.

Sega Sports Tennis Unlock King's Court
To unlock King's Court, defeat the King and Queen in Mixed Doubles, in World Tour Mode (level 5).