The game doesn't launch until late June, but Nintendo will be holding a Pre-Launch Online Tournament (essentially a beta test) earlier in the month.
The demo will be available for download from the Nintendo eShop in Japan starting May 25.
With up to four-player local (additional accessories may be required and are sold separately) and online multiplayer, and a story mode that even includes creative boss battles, Mario Tennis Aces is one of the most robust Mario sports games yet.
We were also treated to a brand new Adventure Mode trailer this morning, which gives us a very brief rundown of the game's story and the various enemies you'll encounter in your quest to save Luigi.
The free pre-launch tournament is open from 6 p.m. PT on June 1 to 11:59 p.m. PT on June 3. If you gain enough performance-related points, you can unlock a further five characters, though it's not clear who these are. Nintendo didn't say which characters will be unlockable during the beta. As you venture around the Mushroom Kingdom, you'll take on different kinds of matches and minigames to tighten those tennis skills and bolster your stats. For a limited time, players can try out online tournament matches in the game before it launches. Nintendo didn't say if users will have to unlock an achievement to get the outfit or if it will be automatically awarded to all players who participated in the Pre-Launch Tournament. Another short clip highlighted the game's single-player Adventure Mode.