KalshiCheck availabilityKYC requiredVerified resolution dataWell calibratedCurrent implied probability
Nathaniel Lammons / Jackson Withrow 69.9%Vig-adjusted: raw venue quotes summed above 100% and were normalized.
Nathaniel Lammons / Jackson Withrow 69.9%Market quality
45 / 100
Low quality24h Volume
$0.3
Open interest
$0.1
Low open interestBid / Ask
23.0% / 27.0%
Spread
4.0 pt
Moderate spreadMarket data
Updated 3 minutes ago
Sep 30, 26, 5:30 PM UTCOct 15, 26, 5:20 AM UTC
Trends
Venue terms
Source: Kalshi
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Early close:
- Yes
- Settlement timer:
- 1m (informational)
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Related questions for context, not a comparison of equivalent contracts.
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KalshiRules
If Nathaniel Lammons / Jackson Withrow wins the Harris / Hsieh C-P vs Lammons / Withrow professional tennis match in the 2026 ATP Challenger Jingshan Quarterfinal after a ball has been played, then the market resolves to Yes.
Settles via:ATP
- The following market refers to the Harris / Hsieh C-P vs Lammons / Withrow professional tennis match in the 2026 ATP Challenger Jingshan Quarterfinal after a ball has been played. If the match does not occur (signaled by a ball being played) due to a player injury, walkover, forfeiture, or any other cancellation (all before the match starts), the market will resolve to a fair price in accordance with the rules. If this match is postponed or delayed, the market will remain open and close after the rescheduled match has finished (within two weeks). Kalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.
Rules for each outcome
- Nathaniel Lammons / Jackson Withrow
- If Nathaniel Lammons / Jackson Withrow wins the Harris / Hsieh C-P vs Lammons / Withrow professional tennis match in the 2026 ATP Challenger Jingshan Quarterfinal after a ball has been played, then the market resolves to Yes.
- Lloyd Harris / Cheng-Peng Hsieh
- If Lloyd Harris / Cheng-Peng Hsieh wins the Harris / Hsieh C-P vs Lammons / Withrow professional tennis match in the 2026 ATP Challenger Jingshan Quarterfinal after a ball has been played, then the market resolves to Yes.
