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%
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu
- Polymarket
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu - Polymarket
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Vol.
·
Resolved Aug 28, 2026
Closed: Aug 28, 2:22 PM EST
Polymarket
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Match O/U 21.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set 2 Winner
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Total Sets: O/U 2.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set Handicap +/-1.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Game Spread +/-4.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set 1 Winner
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Yulia Starodubtseva vs Ella Seidel: 3 or more total sets?
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set 1 O/U 8.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set 2 O/U 8.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set 1 O/U 9.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Match O/U 22.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set 2 O/U 9.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Match O/U 23.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set 1 O/U 10.5
US Open, Qualification WTA: Tamara Zidansek vs Bianca Andreescu Set 2 O/U 10.5
Intro
This market tracks the outcome of a tennis match between Yuliia Starodubtseva and Ella Seidel in the 2026 US Open Women Singles Round Of 128, specifically which player will win. Currently, the consensus probability of Yuliia Starodubtseva winning is 89.0%. This aggregate reflects trading activity from Polymarket, Limitless, and Kalshi, and will resolve based on Official WTA/US Open match results and statistics. Keep an eye on the start of the US Open tournament on September 2nd, 2026, as that marks the beginning of the event window for this market’s resolution.
PredictionHero - Resolution Divergence Alerts (RDA)
Unified Resolution Criteria (Consistent across platforms)
All platforms agree on core resolution logic for match winner and total sets, with consistent handling of cancellations and incomplete matches.Primary resolution logic: Official WTA/US Open match results and statisticsCore resolution logic:
- Match winner resolves to the player who wins after at least one ball is played
- Total sets market resolves based on completed sets (super tiebreaker counts as one set)
- Markets resolve 50-50 if match is canceled before play begins or unresolved after 7 days
Edge cases & clarifications:
- Match starts but is incomplete: Resolves 50-50 unless outcome is unconditionally determined by completed play
- Walkover/retirement: Match winner resolves to the advancing player; total sets resolves based on completed play
Polymarket
This market refers to the tennis match between Tamara Zidansek and Bianca Andreescu in the US Open, Qualification WTA, originally scheduled for August 27, 2026 at 12:30PM ET. This market will resolve to 'Tamara Zidansek' if Tamara Zidansek advances against Bianca Andreescu. This market will resolve to 'Bianca Andreescu' if Bianca Andreescu advances against Tamara Zidansek. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 10, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50. 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 the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.
Kalshi
If Yuliia Starodubtseva wins the Starodubtseva vs Seidel professional tennis match in the 2026 US Open Women Singles Round Of 128 after a ball has been played, then the market resolves to Yes. If Ella Seidel wins the Starodubtseva vs Seidel professional tennis match in the 2026 US Open Women Singles Round Of 128 after a ball has been played, then the market resolves to Yes.
Limitless
This market refers to the tennis match between Yulia Starodubtseva and Ella Seidel in the WTA US Open, originally scheduled for August 30, 2026 at 15:00 UTC. This market will resolve to "YES" if the total number of sets completed equals or exceeds 3. Otherwise, it will resolve to "NO." A super tie breaker is considered as one (1) set for total set markets. If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
