PolymarketOpen

Japan Open Tennis Championships: Completed Match: Matteo Arnaldi vs Rei Sakamoto

Yes52%
No48%

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24h volume—
7d volume—
30d volume—
Liquidity$1.7
Spread88%
ResolvesOct 7, 2026in 7 days

Probability history

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Probability history0%25%50%75%100%Sep 28, 10:11 AMSep 28, 10:09 PMSep 29, 10:07 AMSep 29, 10:05 PMShaded periods have no successful hourly price check.Shaded periods have no successful hourly price check.

Based on this market’s outcome prices, expressed as probabilities.

Resolution rules

This market refers to the tennis match between Matteo Arnaldi and Rei Sakamoto in the Japan Open Tennis Championships, originally scheduled for September 29, 2026 at 9:00PM ET. This market will resolve to "Yes" if all games and sets required to determine a match winner under governing body or event organizer rules are played to completion through normal play. Otherwise, if the match is not completed for any reason, it will resolve to "No." If a forfeit of any kind occurs, including but not limited to a walkover or retirement, this market will resolve "No." If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 13, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to "No." The primary resolution source for this market is the official statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 2 hours after the event's conclusion, a consensus of credible reporting may be used instead.

Sourcehttps://www.atptour.com/en/scores/current

Other legs of this event

MarketVenuePriceStatus
Set 1 Winner: Matteo Arnaldi vs Rei SakamotoPolymarket53% Rei SakamotoOpen
Arnaldi vs. Sakamoto: Set 2 Games O/U 8.5Polymarket51% UnderOpen
Arnaldi vs. Sakamoto: Set 1 Games O/U 9.5Polymarket57% OverOpen
Game Spread: Rei Sakamoto (-0.5) vs Matteo Arnaldi (+0.5)Polymarket52% Rei SakamotoOpen
Arnaldi vs. Sakamoto: Set 2 Games O/U 9.5Polymarket51% UnderOpen
Matteo Arnaldi vs. Rei Sakamoto: Total Sets O/U 2.5Polymarket59% Under 2.5Open
Arnaldi vs. Sakamoto: Set 2 Games O/U 10.5Polymarket51% UnderOpen
Arnaldi vs. Sakamoto: Set 1 Games O/U 10.5Polymarket68% UnderOpen
Arnaldi vs. Sakamoto: Set 1 Games O/U 8.5Polymarket82% OverOpen
Arnaldi vs. Sakamoto: Match O/U 21.5Polymarket62% OverOpen
Arnaldi vs. Sakamoto: Match O/U 22.5Polymarket53% OverOpen
Set Handicap: Rei Sakamoto (-1.5) vs Matteo Arnaldi (+1.5)Polymarket67% Matteo ArnaldiOpen
Set 2 Winner: Matteo Arnaldi vs Rei SakamotoPolymarket54% Rei SakamotoOpen
Japan Open Tennis Championships: Matteo Arnaldi vs Rei SakamotoPolymarket56% Rei SakamotoOpen
Arnaldi vs. Sakamoto: Match O/U 23.5Polymarket55% UnderOpen

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As of Sep 29, 10:30 PM UTC