WII SPORTS TENNIS TIPS & TRICKS
Alternate Court color
When starting a game of Tennis (or immediately after choosing "Start Over" on the Position Select screen), hold 2, The tennis court will become blue. Before playing a match of tennis, when the screen goes black hold 2 until the screen disappears. You will now have a court that is the same as the one in Returning the Ball in Training mode. There will be no audience but you can still hear them.
Change the tennis court
To change the tennis court to the blue practice court, press and hold (2) at the warning screen that shows after selecting characters.