Had a bit of trouble in this one until I noticed there’s a completely safe area around the battle arena. Btw, this video and the last one are actually from last month, I just hadn’t had the chance to upload them.
While the Online Tournament Demo was going on and a few days after it finished, I noticed that a lot of people were commenting and excusing the connection issues by saying that this was supposed to be a network stress test and not a demo of how the game really would be. Actually, though, the Mario Tennis Aces Online Tournament Demo was just an advertisement. It was never intended to be a stress test and probably never used as one.