More to play for
Your bracket is locked. Your calls are not.
Post your calls in #prediction-alpha-nfa on the Jupiter Discord, climb the leaderboard at jupcallers.fun, and win prizes.
Rules & prizes
Pick both 128-player draws, call the matches from the Round of 32, climb one leaderboard. Free to enter: log in with Discord and add the wallet you trade Jupiter Prediction Markets with.
Prize pool
Perfect bracket = 0 mistakes: every one of the 254 picks across both draws is right, Round of 128 through the finals. More than one perfect entry splits it.
Ties are split by call accuracy: if two entries finish level on total points, the one with more points earned from match calls ranks higher, then handle A to Z.
Prizes are paid to the wallet on file. Eligibility is verified against Jupiter Prediction Markets activity on that wallet.
How the tournament runs
- Thu, Aug 27, 12:00 PM ETDraw ceremony: the bracket opens
All 128 names land in each draw. Click players through, round by round, to the title. Edit as often as you like until first ball; the last save counts.
- Sun, Aug 30, 11:00 AM ETFirst ball: everything locks
Brackets and pre-draw picks freeze when play starts on Ashe. Withdrawals before then are re-synced into the draw, so check your bracket the morning of.
- Round of 32 onwardsMatch calls
From the Round of 32, call the winner of each match. One pick per match, nothing else. Each call locks when its match starts, so a day's calls are made before play. A retirement or walkover still counts for whoever advanced.
- Finals weekendFinal standings
The board is final after the men's final. Prizes go out to the top 50 wallets once eligibility and fair play checks are done.
Build your brackets
- Two draws, men's and women's singles, 127 picks each. Pick one or both.
- Tap a player to advance them; the pick flows up the tree. Change a pick and everything above it that depended on it clears.
- One bracket per account. Locked at first ball, Sun, Aug 30.
Match calls
- From the Round of 32: 31 matches per draw, 62 in all. Call the winner. That is the whole call.
- Later rounds pay more: R32 7 · R16 11 · QF 23 · SF 53 · F 109 points. Up to 507 per draw, about half of everything on offer.
- Each match locks at its scheduled start. Miss the bracket and you can still climb the board.
Scoring
Everything adds to one combined leaderboard.
Your bracket · scored as results land
| Round of 128 winner64 matches | 1 |
| Round of 64 winner32 matches | 2 |
| Round of 32 winner16 matches | 4 |
| Round of 16 winner8 matches | 8 |
| Quarterfinal winner4 matches | 16 |
| Semifinal winner2 matches | 32 |
| Champion, wins the final1 match | 64 |
Points double every round, so each round is worth the same 64 in total and the max is 448 per draw, 896 for both. You score a match when the player you advanced from it actually wins it; who they beat does not matter. So a pick keeps scoring as long as that player keeps winning, even if the rest of that section of your bracket has fallen apart. A pick that loses early simply stops scoring; there are no negative points.
Match calls · from the Round of 32
| Winner, Round of 32 | 7 |
| Winner, Round of 16 | 11 |
| Winner, Quarterfinal | 23 |
| Winner, Semifinal | 53 |
| Winner, Final | 109 |
A call is the winner and nothing else. Later rounds pay more, up to 109 for the final: the one call made with the most information. A retirement or walkover still counts for whoever advanced.
Results
Scores come from the official US Open scoreboard and are graded automatically, usually within minutes of the handshake. Picks on a match that has already started are not accepted. If the draw changes before first ball (a withdrawal, a lucky loser), the bracket is re-synced and any pick on a player who is no longer in the draw is cleared, so you can pick again. After first ball your picks are never changed: a player who withdraws stays in your bracket, marked out, and simply scores nothing. The organisers' decision on any dispute is final.
Fair play
One player, one entry.
- One entry per person. A single Discord account and a single wallet per player.
- No multiple or alt accounts, and no sybilling to enter more than once or inflate your odds.