Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto
- 24h volume
- $0
- Total volume
- $521.5K
- Whales
- 6
- Fresh wallets
- 0
Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto$515.3K vol · resolved100.0%+54.4Completed Match · resolved100.0%−3.5Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set 2 Winner$3.3K vol · resolved100.0%+52.4Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Total Sets: O/U 2.5$123 vol · resolved100.0%+59.0Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set 2 O/U 8.5 · resolved100.0%+50.2Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set 2 O/U 9.5 · resolved100.0%+50.0Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Match O/U 21.5$7 vol · resolved100.0%+34.0Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Match O/U 22.5$3 vol · resolved100.0%+38.5Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Match O/U 23.5$27 vol · resolved100.0%+53.4Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set 1 Winner$2.3K vol · resolved0.0%−46.9Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set 1 O/U 8.5 · resolved0.0%−81.2Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set 1 O/U 9.5 · resolved0.0%−57.2Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set 1 O/U 10.5$19 vol · resolved0.0%−32.1Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set 2 O/U 10.5 · resolved0.0%−49.0Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Set Handicap +/-1.5$442 vol · resolved0.0%−33.0Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto Game Spread +/-0.5 · resolved0.0%−51.0Click a row to chart it. Each outcome is its own market, so chances need not sum to 100%. 24h change in percentage points.
Market read
What are the odds on "Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto"?
No outcome is trading right now.
Where is the whale money going?
Our tracker has logged 16 whale bets ($5,000 or more) on this market from 6 wallets since Sep 30, $128.5K in all. The most whale money went to Matteo Arnaldi on Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto: $71.9K, 56% of the total. The largest single bet was $20.4K on Matteo Arnaldi on Japan Open Tennis Championships: Matteo Arnaldi vs Rei Sakamoto at 100¢ by @ezMerge on Sep 30. $521.5K has been traded in total.
How does this market resolve?
The market closed on Oct 7, 2026.
Resolution rules from Polymarket
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 'Matteo Arnaldi' if Matteo Arnaldi advances against Rei Sakamoto.
This market will resolve to 'Rei Sakamoto' if Rei Sakamoto advances against Matteo Arnaldi.
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 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 ATP Tour. A consensus of credible reporting may also be used.
Whales are single buys of $5,000 or more; fresh wallets are first-time accounts betting $500 or more. Prices are Polymarket's own and move with every trade. How we count these.