League · Rules
Rules & format
The complete Clutch 21 rulebook: how a game is won, how a season is won, and everything the officials are watching for.
The game
Twenty-one is played half court, one against one, on a regulation FIBA half with a size 7 ball.
- Scoring. A basket made inside the three-point arc is worth one point. A basket made with both feet behind the arc is worth two.
- Winning. First player to 21 points wins, and must win by two clear points. There is no cap on overtime scoring.
- Time cap. If neither player has reached 21 after ten minutes of game clock, the next basket scored wins the game.
- Start. Possession at the opening check is decided by a coin toss. The player who loses the toss chooses which basket is live.
Possession & clearing
Clutch 21 is winner’s ball. Scoring keeps you on offence — runs are part of the sport.
- Winner’s ball. The scoring player retains possession and checks the ball at the top of the arc.
- Clearing. After a change of possession, the ball must be taken behind the three-point line before a shot attempt. A shot taken without clearing is waved off and the ball turns over.
- Checks. Every dead ball restarts with a check at the top of the arc. The ball is live once it is returned to the offensive player.
- Out of bounds. The sidelines, baseline and half-court line are live boundaries. Touching a boundary with the ball is a turnover.
Clock & shot clock
Two clocks run: a ten-minute game clock and a twelve-second shot clock. Both are operated by the table, not the players.
- Shot clock. Twelve seconds from the check. The ball must hit the rim; failing to do so is a turnover.
- Stoppages. The game clock stops on fouls, reviews, injuries and time-outs. It runs during checks.
- Time-outs. Each player has one 45-second time-out per game. Unused time-outs do not carry over.
- Delay. Two delay-of-game warnings result in a turnover; a third awards a point to the opponent.
Fouls & free throws
Contact is expected. Fouls are called by the officials, never by the players — the pick-up game convention does not apply here.
- Personal fouls. The first four fouls by a player result in a check for the opponent. From the fifth onward, the opponent shoots one free throw worth one point and retains possession.
- Shooting fouls. A foul on a one-point attempt gives one free throw; on a two-point attempt, two. A made basket plus a foul adds one free throw.
- Disqualification. Eight personal fouls, one flagrant, or two unsportsmanlike fouls end a player’s game and forfeit it 21–0.
- Free throws. Taken from the regulation line with the game clock stopped. The shooter keeps possession after the final attempt.
Officiating & reviews
Every league game is worked by two officials and a table crew, with video available on request.
- Crew. One lead official on the baseline, one trail at the arc, plus timekeeper and scorer.
- Reviews. Each player may request one video review per game. A successful challenge is retained; an unsuccessful one is lost.
- Automatic reviews. Two-point line, game-winning baskets and flagrant contact are reviewed by the crew chief regardless of challenges.
- Final say. The crew chief’s decision after review is final and not subject to protest.
Season format & points
The season runs across six city stops and a Finals. Every stop is a sixteen-player single-elimination bracket.
- Entry. Eight seeded professionals per stop, plus eight qualifiers from the open bracket held the previous day.
- Points. Winner 100, runner-up 70, semi-finalists 45, quarter-finalists 30, round of 16 15.
- Qualification. The top eight of the season table after Stop 06 advance to the Finals.
- Finals. Straight knockout from the quarter-finals, seeded by season position. The champion is decided on the night.
- Tie-breaks. Season ties are broken by stop wins, then head-to-head, then point difference.
Eligibility
Clutch 21 is open to any player who meets the league’s age, registration and medical requirements.
- Age. Players must be 18 or older on the date of their first game of the season.
- Registration. A completed league licence, a valid passport or ID, and a signed participation agreement are required before a first game.
- Medical. A physician’s clearance dated within twelve months of the first game must be on file.
- Club commitments. Players under contract to a club must supply written release from that club before entering a stop.
Conduct & integrity
One-on-one is personal by design. What happens between the lines stays competitive, not hostile.
- Respect. Abuse directed at officials, opponents or spectators is an unsportsmanlike foul on first offence and a disqualification on second.
- Betting. Players, officials and staff may not wager on any Clutch 21 event. Breach ends participation for the season.
- Anti-doping. The league follows the WADA prohibited list. Testing is conducted at every stop and at the Finals.
- Media. Finalists are required to attend the post-event media session.
Court & equipment
The playing surface and equipment are standardised so results carry across cities.
- Court. Regulation FIBA half court, 15m × 14m, with a three-point arc at 6.75m.
- Ball. Official league size 7 composite ball, provided at every stop.
- Kit. League-issued jerseys are worn in all bracket games. Personal footwear is permitted.
- Warm-up. Players get eight minutes on court before their first game of the day, four before subsequent games.
Think you can go to 21?
Open qualifiers run in every host city the day before each stop. Sixteen spots. No seeding, no favours.