Nintendo has set the Mario Tennis Fever Open October 2026 Tournament for Oct. 24, with competition beginning at 10:00 a.m. PT. The event will start with a one-on-one, best-of-three, single-elimination bracket, followed by a livestreamed Top 4 double-elimination bracket from 1:00 p.m. PT until a champion is decided.

Matches will use singles play on Stadium Court (Grass) with standard balls, extended play, one set, two games and tiebreakers enabled. All characters and all Fever Rackets are permitted, with one Fever Racket used per match.

Registration is open through Battlefy from Oct. 5, 2026 at 9:00 a.m. PT until Oct. 24, 2026 at 9:30 a.m. PT. The no-purchase-necessary tournament is open to legal residents of the U.S. and Canada age 13 or older, and Mexico age 18 or older, who have access to a Nintendo Switch 2 system, Mario Tennis Fever, a Nintendo Account, reliable high-speed internet and any Nintendo Switch Online membership; eight prize packages will be awarded, including trophies for the top three finishers and Mario Tennis Fever-branded merchandise.