Virtua Tennis 4 Trainer -

If you prefer not to use external software, Virtua Tennis 4 includes built-in unlockables that can be achieved through specific gameplay: RadioSEGA Review: Virtua Tennis 4 (Xbox 360)

Most trainers for the game include a standard set of options to modify gameplay:

Grants maximum currency to purchase high-end gear and items from the Kit Catalogue.

Prevents player fatigue or injuries during long tournament runs in World Tour mode.