TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 11, 11:32 PM EST
Polymarket
In the upcoming US Open ATP singles match between Frances Tiafoe and Ben Shelton, scheduled for September 11, 2026 at 3:00PM ET: This market will resolve based on the final set score of the Frances Tiafoe vs. Ben Shelton match. This match is played in a best-of-5-sets format. The possible outcomes are 3-0, 3-1, “Not Completed”, and 3-2 in either direction. If the match is canceled (not played at all), or is delayed beyond 14 days from the scheduled date at 11:59 PM ET without completion, this market will resolve to 'Not Completed'. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to 'Not Completed' regardless of the set score at the time. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 'Not Completed'. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.
In the upcoming US Open ATP singles match between Frances Tiafoe and Ben Shelton, scheduled for September 11, 2026 at 3:00PM ET: This market will resolve based on the final set score of the Frances Tiafoe vs. Ben Shelton match. This match is played in a best-of-5-sets format. The possible outcomes are 3-0, 3-1, “Not Completed”, and 3-2 in either direction. If the match is canceled (not played at all), or is delayed beyond 14 days from the scheduled date at 11:59 PM ET without completion, this market will resolve to 'Not Completed'. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to 'Not Completed' regardless of the set score at the time. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 'Not Completed'. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.
Prediction market odds often reflect the collective wisdom of a diverse group of bettors, potentially offering a different perspective than traditional sportsbooks. Sportsbooks set lines based on their own models and to balance action, whereas this market is driven purely by individuals willing to put their capital behind their beliefs about the Tiafoe-Shelton match outcome. Discrepancies can arise due to differing information sources, biases, or simply variations in opinion. It’s common to see prediction markets move faster to incorporate new information than sportsbooks, especially regarding player form or injury updates.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in each possible exact score. The price of a share directly corresponds to the implied probability of that outcome occurring. As more traders buy shares in a particular outcome, its price increases, reflecting a higher perceived chance of success. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market’s price is determined by supply and demand, with traders acting as both market makers and informed speculators. This dynamic pricing allows for a real-time assessment of the event’s potential results.
This market resolves around Sep 18, 2026, with the outcome confirmed once the final, official score of the Tiafoe-Shelton match is verifiable from credible public reporting. The resolution will be based on the actual sets and games won by each player, as recorded by the official tournament organizers. The market will determine which exact score was the correct result of the match. Traders will then be able to claim their winnings based on the outcome and their holdings in the corresponding shares.
Several factors could influence the trading activity in this market before Sep 18, 2026. Any news regarding player injuries, changes in playing conditions, or significant shifts in player form could all lead to price movements. Unexpected announcements about coaching changes or personal issues affecting either Tiafoe or Shelton could also impact the market. Furthermore, the release of updated statistical analyses or expert predictions could sway traders’ opinions and alter the implied probabilities for each exact score. The closer we get to the match, the more sensitive the market will likely be to new information.