Go team, go!
Quite some time after being announced the Splatoon 3 Tournament Manager is now available. The league (round-robin) and elimination w/ preliminaries formats are live, and a license number is now required to create a tournament that exceeds the limits in the Community Tournament Guidelines. Tournaments can be created both through SplatNet 3 (in the Nintendo Switch Online app) as well as through a PC or mobile browser at the following link.
Tournament Manager offers several support features for tournament directors, including automatic recordkeeping and the ability to create Private Battle rooms. For detailed information on the exact steps necessary to create and manage a tournament, you can check out Nintendo’s official documentation here. That same page will also give you details on how to join and play in a tournament.