Alexander Zverev beat Ben Shelton 6-3, 7-6(2), 5-7, 6-2 on Sunday, September 13, 2026, at Arthur Ashe Stadium, for his first US Open title and his second major. Kalshi's contract on him closed at 5:54:46 p.m. ET and paid $1. The Shelton contract paid nothing. The crowd that bought it put $2,619,521 in, $912,743 of that before the first ball.
By Jake Hari. The pre-match version of this page is quoted below as it stood. Every Kalshi figure is from the exchange's public trade log for both legs of the match contract and the title board, pulled after settlement; the score and match detail are from ESPN's match report. Nothing here is financial advice.
How Zverev Won It
The match went the way the record said it would, and it started that way inside two points. Per ESPN, Shelton served first, lost the opening two points, and handed the game to Zverev with a double fault; the set ended on another Shelton double fault, 6-3. The second set went to the tiebreak that four of their eleven previous sets had gone to, and Zverev played it, in ESPN's words, nearly flawlessly on serve: a 16-shot rally for 3-0, serves of 147 and 124 mph that Shelton could not return, a 139 mph serve to close it 7-2. Shelton got a return in play once.
The third set is the one the crowd came for. Shelton broke Zverev for the only time in the match and took the set 7-5, his second set ever against him. Then he was broken to open the fourth, the second time in the afternoon he lost his opening service game, and the set went 6-2. Zverev finished it on his own serve and, per ESPN, did not realize he had won until a few moments later. "I know today 99.9% of the people wanted Ben to win, so I'm very sorry first of all," he said at the presentation. He is 25-2 in major matches this year and the fourth man in the Open era to win his first two majors in the same season. Shelton, 23, is 0-6 against him, and the American men's wait since Andy Roddick in 2003 goes on.
The Price History: 59¢ At Two O'Clock, 99¢ By 5:45 p.m.
The tape does not carry the score, only its shape: the times below are when money moved, which is not the same as when the umpire called the set. Zverev's in-match low was 58¢, at 2:00:24 p.m.
| Time (ET) | Zverev | Shelton | What the tape was reacting to |
|---|---|---|---|
| 1:59:58 p.m. | 59¢ | 43¢ | Last prints before the first ball |
| 2:24 p.m. | 70¢ | 31¢ | Shelton's opening service game, lost on a double fault |
| 2:58 p.m. | 74¢ | 27¢ | First set to Zverev, 6-3 |
| 3:55 p.m. | 78¢ | 22¢ | Into the second-set tiebreak |
| 4:05 p.m. | 89¢ | 10¢ | Tiebreak 7-2, two sets to Zverev |
| 5:12 p.m. | 68¢ | 32¢ | Shelton's only break, third set 7-5 |
| 5:16 p.m. | 89¢ | 11¢ | Shelton broken to open the fourth |
| 5:23 p.m. | 92¢ | 9¢ | Fourth set running away |
| 5:45:50 p.m. | 99¢ | 1¢ | Match point; 87,439 Zverev contracts bought at 99¢ at 5:46:09 p.m. |
| 5:54:46 p.m. | settled $1 | settled $0 | Contract closed |
Prices are the last trade at or before each clock time, from Kalshi's trade log for both legs; the right-hand column maps them to ESPN's account of the match, and the set times are the tape's, not the umpire's. 8,890,222 contracts traded on the Zverev leg and 14,113,258 on the Shelton leg over the life of the market; 11,936,908 of Shelton's traded during play.
The row to sit with is the third-set one. For four minutes the market gave the American a better than one-in-four chance of winning two more sets against a man who had never lost two sets to him in a match. Then he was broken to open the fourth and the price was back at 89¢. That is what a 7-5 set was worth on the tape: about a quarter, for four minutes.
What The Pre-Match Read Got Wrong, And What It Got Right
Sunday morning's edition said the price was pricing the record and the crowd was pricing the story. For Shelton to be the buy, three things had to be true: that 5-0 does not travel, that Zverev's tiebreak record was a sample and not a skill, and that a 1-7 season against the top ten was noise. The first two got answered against him; the third never came up, because the sets were never close enough. The page did not call the match. What it got right was the part a reader could use: that the quoted 43¢ was the only price worth arguing with, that a buyer at 43 needed Shelton to win about 45 percent of the time after the fee, and that the one number to watch was the eleventh set, one taken from Zverev in two years against a crowd buying three of five. He took one. What it got wrong was the size of the bet. It treated the two Friday-night sweeps, 340,661 Shelton contracts for about $148,000, as the biggest position on the board; by 2:00 p.m. the crowd had bought 2,108,541 Shelton contracts at an average of 43.3¢, $912,743 in all, 1,581,326 of them at exactly 43¢ from the offer the page called the tell. The sweeps were a fifth of it.
The Title Board Paid The Same Dollar For Two Cents Less
Sunday morning's page pointed out that Zverev cost 59¢ on the match contract and 57¢ on the tournament title board, and that with two names left the two contracts paid on the same afternoon. They did. The title contract on Zverev settled Yes at 5:55:01 p.m., fifteen seconds after the match contract, and paid the same dollar. A buyer who took the title board's 57¢ instead of the match market's 59¢ made two cents more on every contract for the same afternoon, and 3,042,429 contracts traded on that Zverev title contract against 4,337,806 on Shelton's. On 100 contracts of Zverev at 59¢ the fee was $1.70 and the profit $39.30; at 57¢ it was $41.28. Same bet, two names, two prices.
What The 43¢ Was Worth
Here is what each side of the Friday-night argument was paid.
The two Friday-night sweeps paid nothing. So did the 773,616 Shelton contracts bought between the Sunday-morning refresh and the first ball, almost all of them at 43¢ from the offer that held 4.2 million. Across the whole pre-match market the Shelton buyers paid $912,743 for 2,108,541 contracts, and the contract settled at zero.
The one Zverev buyer who took 230,870 contracts at 58¢ at 2:04:11 a.m. Sunday paid $133,905 and a fee of $3,937, and was paid $230,870: $93,029 clear. That print was the biggest on either leg before the match, and it was the record buying back against the story.
Then the match, where the buying did not stop. Shelton contracts kept getting bought all afternoon, 9,189,959 of them at an average of 18.6¢, $1,706,778 in all:
| Shelton price paid | Contracts bought during play | Dollars in |
|---|---|---|
| 30¢ to 43¢ | 1,907,168 | $669,423 |
| 20¢ to 29¢ | 2,204,548 | $557,643 |
| 10¢ to 19¢ | 3,461,467 | $410,526 |
| 1¢ to 9¢ | 1,616,775 | $69,186 |
Taker-yes fills on the Shelton leg from 2 p.m. to the close, grouped by price, from the trade log. A buyer could have sold out before the close, so the dollars in are what was paid, not a loss figure.
Add the two and the Shelton contract took in $2,619,521 from buyers over its life for 11,298,500 contracts, 23.2¢ apiece on average, and paid out nothing. Zverev's leg took in $5,123,593 from buyers for 6,783,315 contracts at an average of 75.5¢, and paid $6,783,315. Most of that Zverev buying came after the first set, at 70¢ and up, from people paying for what they had just watched; the 1,042,426 contracts bought before 2 p.m. at an average of 58.2¢ were the ones that got the record at the record's price.
Where The Rivalry Sits Now
Sunday morning's page called 43¢ the price of finding out. Finding out cost $2,619,521. Next time these two are on a Kalshi board the 5-0 will be a 6-0, and the crowd will be back at the offer, because the story is the better story.
More on this: Sabalenka Vs Rybakina Odds: The Board Picked A Side. It Lost · Shelton Vs Tiafoe Odds: 33,000 Contracts On The Underdog, Again · Zverev Vs Van De Zandschulp Odds: The Man Who Beat Alcaraz Here Is 7-To-1
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