Japan Women's Open: Katerina Siniakova vs Peyton Stearns

Polymarket Sports › Tennis Final 6-4, 0-6, 4-0 · FT Closed, awaiting its result Closed Sun 9:00 PM ET · $279K today · $28K traded · $17K at stake

The last odds before it closed

Katerina Siniakova>99%▲ 44

Peyton Stearns<1%▼ 44

How the odds have moved

Katerina Siniakova: 56% on Oct 20, >99% now.

Each outcome's chance over time on Polymarket. The dots along the bottom are headlines about its subject: point at one to read it.

Every outcome

Outcome	Chance	Day	Bid	Ask	Pays	Traded
Katerina Siniakova	>99%	▲ 44	100¢	100¢		$277K
Peyton Stearns	<1%	▼ 44	0¢	0¢		$277K

"Pays" is what a $1 stake returns if that outcome happens, at the price shown (before any fees). Bid and ask are the best prices to sell and buy "Yes".

The news: Katerina Siniakova, Peyton Stearns

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Siniakova beats Krueger in straight sets to win Japan OpenIANS News · 2 days agoOsaka, Oct 25 (IANS) Katerina Siniakova captured the Japan Open title with a straight-set win over Ashlyn Krueger here on Sunday. Siniakova needed just 64 minutes to seal a dominant 6-1, 6-0 victory and claim the sixth WTA singles title of…
46-year-old Venus Williams to return next week, faces opponent 28 years younger aiming to snap 16-match losing streakYardbarker · 2 days agoVenus Williams will return to action at the Guangzhou Open, where she faces an 18-year-old opponent with a 16-match losing streak on the line. The seven-time Grand Slam singles champion is looking to secure her first singles victory since…
Venus Williams faces 28-year-younger opponent with 16-match losing streak on the lineYardbarker · 3 days agoVenus Williams will return to action at the Guangzhou Open, where she faces an 18-year-old opponent with a 16-match losing streak on the line. The seven-time Grand Slam singles champion is looking to secure her first singles victory since…
WTA roundup: Elena Rybakina, Katerina Siniakova win titlesYardbarker · 2 days agoElena Rybakina successfully defended her Ningbo Open title with a 6-2, 6-2 romp over Leylah Fernandez in the tournament final on Sunday in Ningbo, China. Rybakina, a Russia-born Kazakhstani, secured her fourth title of the year after…
Katerina Siniakova wins Japan Open, beating Ashlyn Krueger 6-1 6-0News18 · 2 days agoSiniakova broke the 22-year-old American’s serve six times in just 64 minutes to claim her sixth career singles title and first since winning the Jiangxi Open in Nanchang, China, in 2023. The 30-year-old is better known for her doubles…
Katerina Siniakova wins the Japan Open, beating Ashlyn Kreuger 6-1, 6-0ABC News · 2 days agoKaterina Siniakova of the Czech Republic claims her first singles title in three years with a dominant 6-1, 6-0 win over Ashlyn Kreuger at the Japan Open Katerina Siniakova wins the Japan Open, beating Ashlyn Kreuger 6-1, 6-0 Katerina…
Katerina Siniakova wins the Japan Open, beating Ashlyn Krueger 6-1, 6-0SFGATE · 2 days agoKaterina Siniakova of the Czech Republic claims her first singles title in three years with a dominant 6-1, 6-0 win over Ashlyn Krueger at the Japan Open. On Sunday, Siniakova broke the 22-year-old... Siniakova broke the 22-year-old…
Japan Open 2026 Finals: Katerina Siniakova Beats Ashlyn Krueger 6-1, 6-0 to Win First WTA Singles Title Since 2023The Sunday Guardian · 2 days agoKaterina Siniakova defeated Ashlyn Krueger 6-1, 6-0 to win the Japan Open in Osaka and claim her first WTA singles title since 2023. The Czech secured her sixth career singles trophy in just 64 minutes, becoming the first Czech player to…
Kateřina Siniaková beats Katie Boulter 6-1, 6-4 in Osaka to set up Japan Open final against Ashlyn KruegerKarloBag.eu · 3 days agoSiniaková beats Boulter to reach Japan Open final in Osaka KarloBag.eu Kateřina Siniaková stops Katie Boulter in Osaka and reaches final against Ashlyn Krueger Czech tennis player Kateřina Siniaková advanced to the final of the Kinoshita…
WTA Rankings Update | Elena Rybakina bolsters advantage as World No.1 following latest title successYardbarker · 27 h agoThere are only a few weeks left of WTA competition, with it being the players' last chance to collect a serious amount of points to add to their WTA rankings tally. The Asian swing still continues, and another couple big tournaments have…
The new WTA rankings confirmed with Iga Swiatek, Leylah Fernandez and Katie Boulter all having new spotsYardbarker · 27 h agoIga Swiatek is even being impacted in the WTA rankings despite calling an end to her 2026 season. Swiatek announced that she was ending her season last week, explaining that she needed to rest and recover her body fully. This also…
She is the 13-time Grand Slam doubles champion who has just won her sixth WTA Tour singles titleYardbarker · 47 h agoKaterina Siniakova has once again proven that she is one of the most talented individuals competing on the professional tennis circuit. Siniakova, who is undoubtedly a future Hall of Fame player, has won 13 Grand Slam titles across doubles…

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Odds are traders' prices on Kalshi, Polymarket, ForecastEx and Crypto.com, not forecasts by 4Conservative. Prices read from the venues 3 min ago. Prices may be delayed. Money traded on Kalshi and ForecastEx is estimated from contracts. Not betting or investment advice.

About this market

VenuePolymarket

Settles onwtatennis.com

StartsOct 20, 2026 1:45 AM ET

Trading closedOct 25, 2026 9:00 PM ET

Traded$28K

Today$279K

This week$28K

At stake$17K

Followed here sinceOct 19, 2026

The rules

This market refers to the tennis match between Katerina Siniakova and Peyton Stearns in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to 'Katerina Siniakova' if Katerina Siniakova advances against Peyton Stearns. This market will resolve to 'Peyton Stearns' if Peyton Stearns advances against Katerina Siniakova. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 1, 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 disqualifi

The full rules are on the market's page at Polymarket.

Reading the odds

A prediction market trades contracts that pay $1 if something happens. Its price is the market's chance: a contract at 62¢ means traders give it 62%. Each number here is the midpoint between the best bid and offer, or the last trade when they are more than ten cents apart.

For a question with many answers (who wins, which range a number lands in), the chances are scaled to add up to 100%. A price ladder ("above 4.25%, above 4.50% ...") gives a whole distribution: its median is where traders see an even chance either way.

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Prediction-market prices are what traders pay for each outcome on Kalshi, Polymarket, ForecastEx and Crypto.com, read as the market's implied chance. They are not forecasts by 4Conservative, can move fast and can be wrong; they are read every few minutes and may be delayed. Money traded on Kalshi and ForecastEx is estimated from contracts at their price. News comes from the 4Conservative index; prices of stocks, rates and coins from 4Conservative Finance. Nothing here is betting, financial or investment advice. Terms of use. How to use Predictions