KalshiCheck availabilityKYC requiredVerified resolution dataWell calibratedData quality warningNot meaningfully priced
Data as of Oct 1, 2026, 11:19 PM UTC · policy pm-quality-4
Current implied probability
Stefanos Tsitsipas 56.4%
Stefanos Tsitsipas 56.4%Market quality
≤49 / 100
Low quality24h Volume
—
Open interest
—
Open interest unknownBid / Ask
43.0% / 44.0%
Spread
1.0 pt
Tight spreadMarket data
Updated 6 minutes ago
Oct 1, 26, 6:20 AM UTCOct 16, 26, 2:00 AM UTC
Trends
Venue terms
Source: Kalshi
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Early close:
- Yes
- Settlement timer:
- 5m (informational)
Related Markets
Related questions for context, not a comparison of equivalent contracts.
Rules
If Stefanos Tsitsipas wins set 1 in the Valentin Vacherot vs Stefanos Tsitsipas professional tennis match in the 2026 ATP Tokyo Round Of 16, then the market resolves to Yes.
Settles via:ATP
- The following market refers to the Valentin Vacherot vs Stefanos Tsitsipas professional tennis match in the 2026 ATP Tokyo Round Of 16. 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). If a retirement occurs, all markets that can be unconditionally settled based on play already completed will resolve accordingly. Any markets that cannot be unconditionally settled will resolve to Fair Market Price, as determined at the sole discretion of the Exchange. 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
- Stefanos Tsitsipas
- If Stefanos Tsitsipas wins set 1 in the Valentin Vacherot vs Stefanos Tsitsipas professional tennis match in the 2026 ATP Tokyo Round Of 16, then the market resolves to Yes.
- Valentin Vacherot
- If Valentin Vacherot wins set 1 in the Valentin Vacherot vs Stefanos Tsitsipas professional tennis match in the 2026 ATP Tokyo Round Of 16, then the market resolves to Yes.