When you are standing below the ball and waiting for the smash hit opportunity, your opponent will run to the other side of his court. After he/she does this, aim your smash for the side that player was just on and you will have about a 90% chance of scoring.
General tips
Always hit the ball where your opponent is not, to keep him/her on his/her feet. You will have a better chance of scoring if you hit the ball away from your opponent. Do not assume anything. When your opponent is about to hit a deep shot, stay in the center of the court so you can reach a ball that is hit to either side.
Hidden players
Beat the arcade mode on hard without losing once to win hidden characters. There is both a male and female hidden character.
Hitomi Yoshino
Win the game in arcade mode under the hard difficulty setting as a female character with no losses. Select exhibition mode and move past Rafter on the character selection screen to access Hitomi Yoshino.
Red Ace
Win the game in arcade mode under the hard difficulty setting as a male character with no losses. Select exhibition mode and move past Rafter on the character selection screen to access Red Ace.
Ultimate difficulty
Successfully complete time attack mode under the hard difficulty setting.