Mario Tennis Aces has a day one update which changes the game's tournament mode. It's as much of a surprise to us as it is to you - Eurogamer was under the impression the build we played was final code, with Nintendo failing to mention any day one updates when it handed out review code.
Nintendo Switch Family Showdown is a new family game show set to be broadcast this summer.
Mario Tennis Aces will launch for Nintendo Switch on 22nd June, but you'll be able to try it yourself several weeks earlier via a pre-launch online tournament.
It's a kind of beta, in other words, similar to that received by Splatoon 2 and Arms last year.
You'll be able to try this serving of Mario Tennis Aces from 3pm UK time on Friday, 1st June until midnight UK time on Sunday 3rd June.
Screenshots and details for Mario Tennis Aces have popped up online via retailer Rakuten ahead of tonight's Nintendo Direct.
The game's product page lists a 22nd June release date for Mario's sporty Nintendo Switch game - at least in Japan. (It's likely the same here.)
Images confirm the usual roster of characters you'd expect to be playable, including Mario, Wario, Waluigi, Daisy, Rosalina, Yoshi, Donkey Kong and Bowser.