The women's final of the Cincinnati Open, a WTA 1000 hard-court event and the last big tune-up before the US Open, comes down to two Americans who know each other about as well as two tennis players can. Coco Gauff and Jessica Pegula have met nine times as professionals, they won five doubles titles together as partners in 2022 and 2023, and on Sunday they play for the biggest title Cincinnati awards. Within hours of the semifinals ending, Kalshi listed a head-to-head market on the final, and the crowd there did something worth stopping on: it made Gauff a clear favorite over an opponent who leads their career series.
I spent Saturday night watching the prices move, and this piece walks through what they say. We priced the men's side of this tournament on our Cincinnati Open winner page, and the women's board ended somewhere far stranger: one finalist traded at 6 cents entering Saturday. Below you will find both of Kalshi's Cincinnati boards, a three-cent gap between them on the same outcome, and the US Open women's board that has to reprice the moment this final ends.
The Quick Answer
Kalshi prices Coco Gauff as the favorite in Sunday's all-American Cincinnati Open final, at 57 to 58 cents on the dollar against Jessica Pegula at 43 to 44, even though Pegula leads their career head-to-head 5-4. The full prices on both Kalshi boards, the gap between them, and what today's result does to each player's US Open number are below.
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The Night The Board Flipped
Saturday's semifinals rewrote the tournament board in about four hours. Gauff needed 76 minutes to beat Czech opponent Sara Bejlek 6-4, 6-1. Pegula's win was a different kind of evening: she went nearly three hours with Iga Swiatek, dropped the second set, fell behind 1-3 in the third, and still closed it 7-5, 4-6, 6-4, according to Yahoo Sports' match report.
The prices moved accordingly. On Kalshi's tournament winner board, Gauff repriced from 33 cents to 59 as the semifinals went final. Pegula jumped from 6 cents to 41. Sit with that second number for a moment: entering Saturday, the crowd gave the eventual finalist about a 6% shot at the title, largely because Swiatek stood in her path. Traders who paid 6 cents for Pegula before the semifinals now hold a contract quoted in the 40s. The 6-cent lesson matters later in this article, because the same crowd that missed Pegula on Saturday morning is the one pricing her on Sunday.
Saturday morning's tournament board sold Pegula at 6 cents. Sunday's asks 41. One semifinal moved her price nearly sevenfold.
Kalshi then listed the head-to-head market on the final itself, ticker KXWTAMATCH-26AUG23GAUPEG, late Saturday night. It filled fast. By early Sunday morning the Gauff side held about 62,000 open contracts on roughly 64,000 contracts of lifetime volume, with another 12,000 open on Pegula. For a market that did not exist at dinnertime, that is real participation, and the quotes are tight: the highest price a buyer will pay and the lowest a seller will take sit a single cent apart on both sides.
A Worked Example: What A 57-Cent Favorite Buys You
A Kalshi contract pays out $1 if the named player wins, so a 58-cent ask on Gauff means the crowd will only sell you her side at a price that breaks even if she wins about 58% of the time. Run the worked example: 100 Gauff contracts at the 58-cent ask cost $58, settle at $100 if she wins the title, and go to zero if she does not, so the position risks $58 to profit $42. Pay less than fair and the position carries value; pay more and the seller keeps the difference. I keep our Kalshi odds guide open for exactly this translation, and it converts any cent price into American odds and a win percentage in one step.
Here is what makes 57-58% interesting rather than routine. Pegula leads the career series 5-4. Their most recent meeting came in July, a 4-6, 6-3, 6-3 Gauff comeback in the Wimbledon quarterfinals that ended a 5-3 Pegula series lead, per Yahoo Sports. So the record says Pegula, and the most recent match says Gauff, and the crowd has decided the recent match is the one that counts. Add Saturday's workloads, a 76-minute stroll against a nearly three-hour battle on less than a day's rest, and you can see the case the 57-cent side is making. Whether a 5-4 series should ever produce a near 60-40 price is exactly the question a buyer of the Pegula side is asking.
Both Cincinnati boards, as of August 23, 2026, early Sunday morning Eastern time:
| Contract | Bid | Ask |
|---|---|---|
| Gauff (Match Board) | 57¢ | 58¢ |
| Pegula (Match Board) | 43¢ | 44¢ |
| Gauff (Tournament Board) | 56¢ | 59¢ |
| Pegula (Tournament Board) | 40¢ | 41¢ |
The row worth narrating is Pegula's. With only the final left, "wins the match" and "wins the tournament" are the same claim, yet the match board asks 44 cents for her and the tournament board asks 41. Two boards asking three cents apart for identical outcomes is the kind of seam that shows up when a brand-new market draws a crowd while an older board goes quiet.
The Three-Cent Gap Between Kalshi's Two Boards
Why does the gap exist? The match market launched Saturday night and pulled most of the weekend's action, about 74,000 open contracts across both sides against roughly 51,000 on the two surviving tournament contracts. The tournament board also carries wider quotes on Gauff, 56 bid against a 59 ask, while the match board holds her at a one-cent spread. Prices follow attention, and attention moved to the new listing.
Two honest cautions before anyone tries to trade the seam. First, the tournament board as a whole holds far fewer open contracts than the new match market, and a quote is only as good as the size resting behind it. Second, Kalshi's fees and the round trip between entering and exiting eat into small edges. The match market closes early and expires as soon as a winner is declared, so its contracts finish at zero or a dollar today. The table earns its place by showing that even on one platform, the same question can carry two answers, and knowing which board you are reading is part of reading tennis prediction markets at all. Our Kalshi picks hub tracks gaps like this one across the whole exchange every day.
What Today Does To Each US Open Number
Cincinnati is the last WTA 1000 before New York, so today's result echoes loudest on a board that settles two weeks from now. On Kalshi's US Open women's winner market, the early Sunday quotes read like this:
| Player | Kalshi US Open price (bid / ask) |
|---|---|
| Aryna Sabalenka | 22¢ / 23¢ |
| Iga Swiatek | 16¢ / 17¢ |
| Coco Gauff | 11¢ / 13¢ |
| Naomi Osaka | 8¢ / 9¢ |
| Mirra Andreeva | 6¢ / 7¢ |
| Jessica Pegula | 5¢ / 6¢ |
One row jumps off that table. Pegula just spent nearly three hours beating Swiatek, the 16-cent second choice, on the same hard surface New York uses, and her own US Open contract still costs about what a cup of coffee's loose change does. The crowd is treating her Cincinnati run as a hot week rather than a new baseline. Remember Saturday's repricing: this is the second time in three days the crowd has filed Pegula under longshot. She emptied that filing cabinet once already.
Gauff's situation reads differently. She sits third on the US Open board at 11 to 13 cents, behind two players who are already out of Cincinnati. A title today hands the crowd a fresh argument that the gap to Swiatek's 16 cents is too wide. A loss to her former doubles partner, with the price on her own side, hands it the opposite one. Either way, the US Open board will not look the same on Monday morning, and watching how far each number travels tells you how much weight traders actually put on this final. We ran the same exercise on the men's side after Cincinnati reshaped the US Open men's board.
OddsShopper's tools do not carry WTA match odds, so I will keep the shop talk to one line: if you want the day's action in the markets we do cover, graded in public, the free expert picks hub is where our sharpest stuff lives today.
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Gauff Vs Pegula FAQ
Who is favored in the Gauff vs Pegula Cincinnati final?
Coco Gauff. As of early Sunday morning, Kalshi's head-to-head market priced her at 57 to 58 cents, which implies roughly a 57-58% chance to win, with Jessica Pegula at 43 to 44 cents.
Who leads the Gauff vs Pegula head-to-head?
Jessica Pegula leads 5-4 across nine career meetings. Gauff won the most recent one, a 4-6, 6-3, 6-3 comeback in the 2026 Wimbledon quarterfinals.
Who did Gauff and Pegula beat in the Cincinnati semifinals?
Gauff beat Sara Bejlek 6-4, 6-1 in 76 minutes. Pegula beat Iga Swiatek 7-5, 4-6, 6-4 in a match that ran nearly three hours.
What does a 57-cent Kalshi price mean?
Each Kalshi contract pays $1 if the named player wins. Buying at 57 cents breaks even if that player wins 57% of the time, so the price doubles as the crowd's probability estimate.
The prices here are the crowd's estimates and our reads are model estimates, not predictions of fact and not financial advice. Kalshi event contracts trade on a CFTC-regulated exchange; they are for adults 18+ in eligible states only.
Prices move, especially on a final-day market, so treat every number here as a snapshot from early Sunday morning, August 23, and re-run the arithmetic at whatever quote you are actually shown. What will not move is the shape of the thing: two Americans with nine matches of history, a crowd that has already been wrong about one of them once this week, and a US Open board waiting on the answer. By Monday, the 57-cent question will have settled to zero or a dollar, and the more interesting prices will be the ones in New York.
